I had to pick myself off the couch after playing this game.
Those who know me from waaaay back know I've always been a skateboarding fan as well as a skater in the early 90's. This game brings me back to those days. Unlike Tony Hawk's games, maneuvering the board consists of using the analog sticks to do anything from an ollie to a tre flip (360 flip). The cities are similar to GTA in that they just go on and on.
The highlight of the game for me is when you get to the X Games portion where you launch off the monster ramp for the insane jumps(Youtube X Games Fall...wow).
You can also get on Live and skate against other players in different competitions which is real dope.
If you've bought the Tony Hawk games, definitely cop this.