About transforming... Hmm...
I've read from MW that people transform their DX alot and things are fine. I only transform it once or twice and the leg joints are already loosening. (for both Michael and Luca valks) I transformed only once for Alto (still in its battroid mode now), so it looks okay thus far. But I've heard about paint chipping off too here?
I used decal for my model kits, and my bad handling messes up the decals a lot of times. I never transformed my models after the 2nd one. But I believe if you use stickers it would be fine.
In terms of carefree-ness, it's the VF100. But it's a part-former, after all. And it's so cheap so you don't really care.