Just rented it the otehr day and I must say, it was pretty good. Sure you can compare it to GTA but this game is in an element of its own. The amount of control you have in this game is incredible as you can slow down time a la matrix and dive away from bullets, pinpoint where your gonna shoot someone and otehr neat tricks. The storyline is good also. Definately recommed pickin this up.
The best part of the game is the "Dogg Patrol". There are 30 bones scattered throughout the game, and if you find all 30, you get to play as Snoop Dogg for an hour at a time... "Just to let you know, this ain't the first time I've slapped handcuffs on a b****!"