They are great, complex turn-based space strategy games.
They do have several peculiarities:
- The AI is pretty bad, and won't challenge a player for long. The Space Empires games shine in slow multiplayer games (e.g. PbEM), the single-player gets boring after a bit. Especially since the AI has no idea how to use the diplomacy functions effectively.
- The graphics are dated and weren't particularly great to begin with, but they do get the job done.
- The games are full of mandatory micromanagement. You will spend a considerable amount of time plotting courses to supply your ships with resources, fuel, and ordnance. (That's right, missiles and torpedos don't appear out of thin air. You need to research their parts, design them, build them, and then transport them to the ships that need them, and replenish these ships' ordnance after a fight). If you like this kind of gameplay, then Space Empires will give you a feeling of control over a complex empire that very few other games can match. However, if you _don't_ like micro-managing, then it might be better to look for a different game.
- Combat, if done simultaneously, is a bit like writing scripts. It can be very fulfilling to see a plan work, but you won't really feel that there's a lot of action.
Personally, I liked these games a lot, and I'd recommend them.