The KO Constructicons DO suck, big time. I bought a set for my son since he's always going on about my G1 originals, figuring "if he breaks them they're only $5.00." Well, he did break a few and he wasn't even being rough with them. They just kinda fell apart during a transformation. Not to mention they had this sticky adhesive all over them, the stickers fell off and they didn't fit together very well.
I guess they aren't even worth the $5 I paid for them.