Not to mention Volcanicus is just awesome.
As for the Studio leader Grimlock, I'm not really sure. I already have the voyager from AoE, which I'm content with. This Grimlock though, while he is really big and the robot mode looks great, the dino mode is pretty meh, and I don't like the bits of soft plastic in the dino teeth and the robot mode head horn. Plus it always bugs me when a Grimlock figure doesn't follow the two key transformation points when it honestly could have. Those being dino legs to robot arms and tail to robot legs.