I got it the day it came out. It was excellent. A little short but a ton of fun. The game play reminded me of Gears of War, but it was set in the Transformer's universe. Great graphics. Great voice over work (they use the "real" Optimus Prime's voice). And they throw a ton of nods in for fans (at one point, Rumble says, "First we crack the shell. Then we crack the nuts inside!")
Very good game. Definitely worth the purchase.