Fellow Seibertronian Chuckdawg has reviewed all three from the first wave: Grimlock, Bumblebee and Optimus Prime. So check out the review below if you are curious about these simpler toys and their mask/helmet gimmick.
chuckdawg1999 wrote:More figures released under the Turbo Changers header, the Knight Armor figures feature spring loaded helmets and very simple transformations. Grimlock is an ok figure with the most interesting helm, while Bumblebee suffers from weak knees. Optimus Prime is the best overall figure with an almost Samurai motif to his helmet.