... and money?

I have very little time with Dungeons & Dragons games -- but lately have been playing games based on The Dark Eye (a German RPG fantasy system) -- and this game intrigues me.

it depends. To say about gameplay - check youtube vids regarding any edition of neverwinter nights (diamond was the most definitive one until this version came up).

To say about this release in particular... Well... it still include diamond edition on GoG, if Im not mistaken. So it definely worth it, if you've liked what you've seen.
"Enhanced Edition", on other side, is kinda... If you've ever played any of beamdog's re-releases - you should understand. If no - they're hella unpolished, to say the least. This one, for example, still miss UI enhancements, added into android release long time ago. Also eats about 2x of PC's resources while providing almost the same quality of visuals. "Visuals-related enhancements", they've talked about, are there - but doesnt alter anything "out of box", as far as I've seen. For the time of writing, they mostly exist for modmaker's sake (and bunch of mods inside steamworkshop already use them. But not a lot).

TLDR: is NWN good? Probably. What s about 'Enhanced Edition'? Its one step up and two steps back

I would recommend getting Pillars Of Eternity on sale, if you don't already have it. It's a vastly better game "out of the box", so you don't have to mod it to really enjoy it. NN modded was a great game for it's time, but the graphics will look like sh*t if you're used to modern games.

I'm fine with older graphics, but I do like allies... and I've always known D&D to be a team / party of allies, not one single ally. That's what's making me hesitate with NVNEE. Maybe Neverwinter Nights 2? Sounds like that has a full AI party.

Note also that the single ally (You can have 2 in Hordes of Underdark and modules based on it) doesn't control well.
You can't control it directly, only give it orders and it acts very dumb a lot if time. So if you don't have patience and tolerance level for a lot of AI shennigans, you wn't have good time with this part of game.
I am actually currently playing through some of the modules and mods and sunk a lot of hours into it and am enjoying it but henchmen are sure able to frustrate me quite a lot sometimes.

I consider the larger graphics in the UI (icons & stuff) a welcome improvement. I couldn't play the original in native resolution (2560x1440, 27") because it was too small and 1080P looked a bit blurry of course.

There are mods to enlarge the fonts, but not the UI graphics.

I "cheat" when I play NN. Make my own custom items in the toolset and play Hordes of the Underdark or mods, so I don't have to hassle with the crappy AI. The party system in Pillars Of Eternity is very decent, the story is superb for the most part, and the gameplay is very good. But NN is definitely worth playing if you know what to expect and are willing to use mods.

As far as the game itself goes (I haven't played the EE and I don't intend to), I've never come to like NWN just like other D&D RPGs, especially Baldur's Gate & Co, for a number of reasons:

- The original game's campaign is awful. It's very bland and forgettable, and nothing compared to that of other games I've played. However, the expansions are quite good, especially Hordes of the Underdark. They can be played without having to play the original campaign and tell their own stories (even though they refer to things from the original campaign, but not much of importance, if I remember correctly). So if you decide to skip the original campaign, you could probably start with Shadows of Unrentide and then play Hordes of the Underdark, if you like with the same character because you start at level 15 - you can also create a new character, which immediately advances to that level.
There are also a number of Premium Modules (some of which have to be bought separately for the EE, but they can all be downloaded for free for the original version), which are somewhat shorter campaigns than the expansions, but to be honest I didn't really like most of them, especially since two of them (Shadowguard and Witch's Wake) are only the first parts of stories that were never finished). Kingmaker and Pirates of the Sword Coast were ok, Wyvern Crown of Cormyr has some unique ideas, but I was still a bit underwhelmed by it. Infinite Dungeons is basically a huge, randomly generated Dungeon, which gets pretty repetitive and tedious after a while. I haven't played Darkness over Daggerford, yet, which used to be a cancelled Premium Module that could be downloaded for free, but is now sold for the EE, but I've heard that it is pretty good.
Additionally, there are countless additional modules (=campaigns), made by fans with the toolset. Some of them are supposedly very good. However, I haven't played any of them, yet.

- The party-based gameplay from Baldur's Gate and the other games with its engine (Planescape: Torment & Icewind Dale) was replaced by a single character that you control and a few compainions that you cannot control directly. If I remember correctly, you could not even access their inventories in the original campaign, but you can in the expansions and in the Premium Modules (that may be different in the EE). Therefore, much of the tactical aspects of the former games is lost in my opinion, and the battles are much less interesting. But that may just be me.

- The UI is, for the most part, horrible and impractical. What used to annoy me most was that the dialogue window is always in the upper left corner, and with higher resolutions and widesceen I found it very difficult to follow the dialogues because of this. This may have been improved in the EE as well. However, there is a mod for the original version (it may also work in the EE, though), which enlarges both the dialogue window and the text itself to a much more eye-friendly size. I've written about it here: https://www.gog.com/forum/neverwinter_nights_series/enhanced_gui_for_nwn_diamond_finally_larger_text_in_1080p

- I've never liked the graphics, not even when the game was new (though it wasn't until several years later that I got to play it), and they haven't aged well at all. Especially the segmented character models are really ugly. Graphics are not everything, of course, but I really prefer the beautiful 2D backgrounds and more realistic sprites of the older games to this "early 3D" ugliness. There are mods, of course, which somewhat improve the graphics, but not as much as is possible for example in Morrowind, which was released around the same time. Of course, they are fundamentally different games.

- I can't say anything about multiplayer, as I've never played it (not much of a multiplayer kind of guy), but I've heard it is one of the strongest points of the game.

Also, I know many people really love this game, so this is just my opinion, and your experience may differ.

When I got it, fairly soon after release, I only played it long enough to realize that I hated the camera too much to bother with it, and that was it. I picked up the GOG version about two years ago and was pleasantly surprised to find that it was playable and modestly enjoyable. But having recently discovered PoE, I have to say that Obsidian has vastly improved as a developer in the interval between the two games.

Not really worth it for the official game or the "enhanced" edition, IMO.
Priceless for all the community content.

In case you don't know yet, Neverwinter Nights is mostly all about the community content and was explicitly made as a tool for creating your own adventures with. It is a game in itself as well, but personally I see the official content more as a demo what you can do with the toolset, and many community modders have shown that they can do better.

If not being able to control your whole party is a turn off for you, stay away from it. But if you think you can get used to it, I recommend it. The companion AI is rather bad, but many community modules improve a bit on it, and you can learn to handle it (instead of directing your companions directly, you can shout orders that make them attack who you are attacking or stay where they are) and you can often program their general behaviour a bit.

In NWN 2 you can control every party member at any time and if you don't, they follow their own programming (unless you turn it off), so IIRC it's a mixture of both worlds. When left to their own devices they aren't very intelligent either, and properly tactical positioning can be a bit hard as well. The official campaigns (especially Mask of the Betrayer) and combat are a little better, graphics are a mixed bag, partially better and more colorful, partially less appealing to me (e.g. halflings are just shrunk humans, which looks weird, characters have the appearance of 3D puppets set in an artificial landscape that doesn't quite fit their style, color etc.). The community content, IMO, is fewer and a bit less interesting, the camera (although there are more modes than in NWN) is rather clunky and inconvenient. The game is also quite resource-hungry, and since it doesn't make use of multicore processors, it can cause some performance issues on modern high end rigs as well.

Still, at the current prices, if you're open to new experiences, I think both games are definitely worth it. In any case, they come with a huge amount of content. Keep in mind that buying these two would also get you the pre-Enhanced Diamond Edition, as well as several add-on campaigns (though not all of the Premium modules, but the missing ones are currently cheap enough as well; none of them is better than the free community content, but especially Darkness over Daggerford and Pirates of the Sword Coast are quite nice as well). If you don't like one campaign, you can just try another, or find free community adventures more to your liking, or even play multiplayer online and chat with other players in-game (if those communities are still alive, haven't visited them in a while).

It's worth the time and money,if you have both.

Nwn is definitely about multiplayer. It's the most fun an RPG game can offer. You can have a full time DM, or go into a persistent world and define your character, build relationships, and set off on adventures with as real consequences as any have could offer.

For single player, if go elsewhere. It's good, but not fantastic.

Some like NWN2. I can't do it. There is too much going on. Your allies all act very fast, the special effects muddy the screen so much you can't see what's going on. Most encounters are over so fast and with so little input that you might not even know what you were fighting. And the camera controls are complete garbage.

How many PW's are up these days?

I'd disagree with Tallima. Multiplayer is indeed a strong forte of NWN, but not a necessity to enjoy the game. I entertained myself with NWN for about three years straight without playing much of anything else on the side (though admittedly that was almost 10 years ago), and only a small part of that was multiplayer, I generally had more fun in single player campaigns, but of course that's a matter of personal preferences and also depending on the modules you play and the people you play with. Just saying, multiplayer is good, but it is not the only reason why NWN is worth it.

EDIT: Personally, I'd say NWN is a great story-telling tool. If you're more interested in combat than story-telling, there are many games that do it better. But there are few that allow users to be as creative with them, and even if you're not interested in creating, you can profit from the creativity of other players.