I found this game very enjoyable and suffered very few glitches, apart form the fact the game occasionally decides to crash in cut scenes that flow between acts. So long as you save often, this really isn't mu of a problem. My other main peeve is that the game does not grow progressively harder, instead the difficult varies constantly. Battling a red dragon is far harder than the end boss encounter, or the end dungeon for that matter.
I had no problem running this on the highest settings and my pc is nothing new (if you have issues with the higher settings, make sure everything is running fine, coz it might not be (as people I've talked about this with have often discovered)).
Many core and prestige classes are present and a dedicated path for both good and the more evil characters for much of the game. These different paths also add different plot points and adventures, making it worthy of replaying. A better system for creating your own items (which I found simple and fun) which I spent alot of time playing about with to create some odd, if powerful items for my characters to use.
All your henchmen are now controllable and you get to gain and lose favour with them (try to gain it though, you'll see why later).
Also, you get your own keep to repair, strengthen and a army to raise (try getting more than 750 men coz that's my record so far!), though the storyline tends to become more linear when you get the keep, the game is alot of fun.
The true down side is the poor ending, it's nothing special in any way, in fact I felt it more of an anticlimax.
The game still deserves 5 stars though, mostly for the fact it has so much playability and a number of subplots and side quests to undertake that oyu may need to play the game several times over to make the most of them.
The toolset is far to over complicated this time though, I struggled for a while with the one in NWN1, but this time I cant get it to do anything at all, not even move around the area you're building in! Sadly this section of the game package makes me drop it a star. A shame really coz the toolset from what I've seen from downloaded modules is quite impressive.