I liked the NWN graphics, though I was dissatified with some parts of the game play. I can't say anything about crashes or gliches on my old and on my new PC. It ran smooth - and the addon was an improvement to the game.

Maybe different taste and different approach, I don't compare a game to another, but take it as it is and play if I feel the interest to continue: did so in NWN - played single, no toolset, no demo.
Kiya