Foiled by the lack of a rotator cuff below the elbow. Same problem as Cannon Bumblebee and Long Haul. It's thus impossible to bend at the elbow without the palm facing the sky, which just looks silly. The double jointed shoulders are quite helpful though.
I still find the original concept Bumblebee's transformation to be the most gratifying, and I Battlefield Bumblebee is my favorite, because it has a proper battle mask and I'm very partial to the battle-mask-and-shoulder-rockets look.
All in all, still pretty good.