i've got some of the v2's so not quite the latest version and they are the only BTP nappy that DD has outgrown, she is still on the middle setting on her flips. She is only 21 months and is average weight and build. The rise is too short and the waist is tiny compared to BG's etc.
I have heard that the latest version has been made slightly bigger so may be better, but i'm certain the ones we've got wouldn't fit a 3 year old. Shame really cos they're great nappies.