If you mean the original Optimus deco, pretty good aside from a major engineering flaw. The shoulder flaps are held in place by a single screw and have to rotate for the transformation. The problem is there isn't enough clearance to rotate the panel, which resulted in many copies having the flaps snap off. It is fixable though with a screwdriver and 5 minutes. Just loosen the screw enough that the panel can raise up to rotate and it's good to go. Doesn't affect the bot mode in any way.