Don't get a game simply because other people say to. From all the magazine reviews I've read and online sites I've gone to, the majority of the scores have been around an 8 out of 10. Try downloading the demo first if you can, or just rent it from Blockbuster or whatever. Who knows, you might be the 1 out of the 5 dentists that doesn't approve or doesn't care for it.
The comic is definitely a good read though...especially since it's free! (see previous post)
Just don't read the whole thing if you want to be surprised if you buy/play the game.