I have it, I love it. The fighting is simple to learn on the Netjet. You can unlock additional characters and worlds by earning "Gold Medals" total score on time, damage taken etc. Recently I unlocked the "Space Bride" It's a small land mass (asteroid? moon?) floating off Cybertron. A destroyed Unicron's head is orbiting the Space Bridge too. Anyway, I find the most fun fighting with G1 Optimus Prime as he kicks the snot out of G1 Megatron, Movie Megatron, G1 Starscream and BW Megatron! Hope to unlock additional characters and worlds soon.  

 

I just might have to get this now.