I've finally finished playing through this mod and to be honest, i had a number of problems with it. First of all, it is pretty buggy. While i didn't encounter anything I couldn't overcome, it was pretty hard sometimes. The mod is polish made, and the English version isn't as prioritized apparently. I had to use cheats on a number of occasions because the game wouldn't let me continue. It also crashes fairly often, so you'll need to be patient to play it. It adds a substantial amount of new content. About 3 or 4 new factions, big or small, new quests, a big new storyline, and all. This all seemed well and good when I started playing it, but after a while i was left with the feeling of just wanting to get the game over and done with, which i'm glad i now have done. The game adds alot of new content but it also brings with you a whole lot of frustrations and if you start it, be prepared for that.
If I wanted to play Gothic 1 for the first time, i'd go either vanilla or with the Golden Mod.