@HandEFood: With the exapansions for NWN a lot of what you get is for people who use the Aurora toolset to build modules. Thinking of it that way, you get a new 20 hour single player campaign. Plus, you get 3 new tilesets for the toolset and a bunch of new creatures to add to your modules! As MeaCulpa said, there are a lot of great fan made modules out already. NWN gives you a lot of bang for your buck if you can look past its flaws. Some of the player made modules are better than the "official" ones.
My opinion of the games flaws:
No real party. Henchman is no substitute
Dodgy performance from an engine that doesnt deliver as much graphiclly as others that run 10 times faster. In my case this seems to because of almost constant hard disk access.
People have complained about the plot but I had no probs with it. I didnt encounter and game stopping bugs either!
