I have to say, my blue one has been transformed a few times, and has lost some small pieces, hands mainly, but my green one while I haven't transformed it yet, and may never, seems a little better/tighter for some reason. Red...well...I'm just gonna leave it in fighter mode more than likely. Although now that I know what to look out for after spending a few years with blue, maybe one day when I'm feeling really crazy I'll transform green and red!