Here's my review of the final Stunticon in the current wave of TF Combiner Wars figures with Motormaster. Pretty much a retool of the Optimus Prime from Wave 1, but overall not too bad.
Where it all falls over I think, is when combined with the rest of the team into Menasor. Pretty terrible body proportions that kind of ruin the look, especially when compared to Superion.
Transformers Generations Combiner Wars Motormaster - YouTube
Hope you can check out the review, subscribe, like, and comment with your thoughts on the the gestalt