Indeed, the game isn't as bad as it's made out to be. It's clean, simple fun. While it won't keep you occupied for weeks, it's still fun the first couple of times through, and it's perfect if you want to waste some time but don't have any friends around for Smash Bros..
The game's graphics are also some of the nicest on the system. The lighting effects are better than Splinter Cell's, and the effects in it are amazing. Cloth physics are also very nice (again, better than Splinter Cell's), but texture detail takes a hit in a few places here and there, but it really isn't noticable.
So yeah, if the price is right, then go for it. It may not be your cup of tea, so to speak, but at least it'll keep you playing until the end.