Not sure what I think.
Unfortunately, the game overstays its welcome repeatedly. After a few hours, I just lost interest. Most quests are fetch quests, which can wear on the player.
A questionable design decision, in my mind, is to keep the player from getting a lightsaber until well into the game. Everyone buys a Star Wars game wanting to use a lightsaber, but it isn't until about 50% of the way through the game that you get one. When you do get one, though, you can customize blade color, use two lightsabers, or have a double-sided lightsaber.
The Force abilities, which are essentially spells, are flashy and fun to use. I especially like the Sith Lightning Storm.
KotOR II implements a useless Light/Dark meter much like Mass Effect. I think that these moral meters are silly, since being right in the middle between good and bad will leave you underpowered, so you are obviously going to choose Light or Dark, depending on how you want the game to play out. (This is especially true in Mass Effect, where SPOILER ALERT your entire crew dies if you choose the middle path, and they all live if you are extreme Paragon or extreme Renegade)
It doesn't put the player in situations where he or she must make difficult choices. They might as well ask you when you start a new game if you would like to be a Jedi or a Sith.
Lasty, while it didn't effect me, is that the game can be completely broken. It is possible to make a bad choice that traps you on planets and forces you to start over the beginning, or at least load a previous save.
In conclusion, Knights of the Old Republic II is a good game. Unfortunately, it didn't hold my attention and a questionable design decision hampered a bit of my enjoyment, especially after how I looked forwards to playing as a Jedi/Sith.