it's unfortunate that the vehicle modes are more or less completely useless - in 90% of the cases you are better off to just walk and shoot - and in the remaining 10% the ride is either to slow (hover mode) or to fast to properly react to situations.
the enemies are dumb as bread, from time to time just standing around doing nothing, and your companions aren't much better - it actually happened twice that they shoved me of a cliff by turning into vehicle mode.
the gameplay is relatively weak, shooting guys, pressing a button, rinse repeat. weapons are to similar (except for starscreams weapon set, it just rocks, seriously overpowered) and the surroundings are only alterable in minor points - they could have saved themselves the PhysiX engine.
From a PC PoV the graphic is mediocre at best, the controls are a bit sluggish and the difficulty level is to low (not necessarily in the health/mobs department but in demanding a bit more than shooting in the general direction to insta-kill a mob).