I don't know if there doing well or not, all I know is the plastic is god awfully cheap, and no matter how cool they are, I refuse to buy anything that's damaged in the package. I was going to buy them all for the Kroens mostly, but all of the sets I opened had stress damage around the wrists (bir Prime, Megatron, Sideswipe, Sentinal). And the small Prime I kept (Iexchanged the damaged sets once, then when I found out the new sets had the same problem I returned them all) has cracks around the ball joints where his legs plug into the waist just from standing on a shelf. Such a cool idea ruined by awful, awful quality control.
