First of all, look at my avatar.
Now, I have created
this topic in SS2 subforum. If you want my detailed thoughts on shortfalls of SS2, go and take a look.
Basically: I said so :-P Still, I'm pleasantly surprised by how few people ended up being disappointed with the game. Also, a suggestion: Go and google System Shock portable. It's the original game made playable for modern gamer by some nifty mods, and the first game is quite simply feels like a far tighter and more thought-trough experience. It's really, really good. I consider it to be way better than the second game.