>>10690102I've got both and I haven't had any problems with them, must be luck of the draw since some anon here or in /m/'s gunpla thread posted a snapped waist balljoint of the white one.
Allegedly an easy fix with some wire and superglue, but I'm sure everyone would rather it hold on it's own.
The only general 30MS related problem I had was on a Luluce where her upper neck ball joint snapped. I guess the flesh-tone arms don't really like the thicker pegs of half the hands they come with, but you can always scrape them off or sand them down.
Black bunny comes with a spare of long hair if you like it more than her pixie cut, her "armored" legs are also a separate build so you'll get an extra pair for other girls if you have them.