Played this game for 6 hours non-stop last night, only to stop because I was tired. Man this game is the best SW game i've ever played in my life, maybe the best RPG!
Very good storyline, like most of the SW Series. Also, the characters interact with each other, arguing and what not. The best part about it, is that a member of your team actually questions you about just being so lucky to escape (you know, like in all of the games, you just "happen" to escape? Well, this guy doesn't trust you, it's great!).
It's sort of based on the D&D Ruleset, and is an amazing game. You can choose whether to be light or dark, and will suffer more of a storyline change than JK:JA.
Apparently, it has more than 40 hours of gameplay... I certainly hope so, i'm going to play it through twice.
Anyway, this game is an epic, like i said, i've been playing for 6 hours and only just come to my Jedi Training, most games nowadays would have been completed in that time!
The choice of weapons is fantastic, and you can upgrade them too, much like your armour. Some parts of the game are puzzle based, but don't need to be completed but might help you, i.e, "slicing" into a droid to activate it's shields, improve it's weaponry and sending it into patrol mode to wipe out the Sith's in the next room, or gassing a room full of soldiers, or disabling security turrets.
Music is much like SW, nice and classical, sound effects are amazing and the animation of your character, and the enemy is truly astounding.
I would definately put it on your "to buy" list if you are a fan of the SW series and/or a fan of RPG's.
[Edit] Sorry, KotOR stands for Knights of the Old Republic, the new PC game in the SW Series, and SW stands for star wars

, thanks to Muno for pointing that out [/Edit]