i didn't care much for it, but like Teh Nitwit said, i sucked when i played it the first time, and had zero desire to ever play again. the one thing that sets it apart is the air combat IMO, the rest of the game was pretty poor, and not nearly as good as other similar games out there.
i think my biggest beef with it was that it's an online only game, so it's pretty much trial by fire. i sucked at it, and had no SP modes to try and get the hang of it, so basically i was trying to learn how to fly the planes, all the while getting shot down every 30 seconds or so.