I saw Mion a month ago, and aside from J Len, Mion has the nicest butt of any girl I've tried at any shop, not just GE. When going to flatiron position I can usually get in position quickly with most girls, but Mion's butt is so thick and full that I had trouble finding my way. It was kind of embarrassing...she noticed me struggling and had to help spread her cheeks. It feels really good getting her from behind. I can't tell if she's had that area enhanced like her boobs or if it's natural. They kind of feel similar. I think at least 45 min. is needed with her. BTW, when I saw her last month her hair was colored a blonde-reddish shade and her English is non-existent.
I haven't seen any of the other girls on your list, but I've read that Chaerin is similar in many ways to Rebecca, and I can say that Rebecca has a nice bum.

