Honestly, I wouldn't wear them. They do look cute, but I just don't have the cojones to reveal so much of my body. I have a big butt, so people would assume I'm "trashy". Just like if a girl shows too much cleavage and has big boobs, people would consider her "trashy" even though she's not. I wear like "grandma" bathing suits like a tank top and shorts. I dress modestly and almost prudish sometimes. But I try to not go much to the beach in the first place.
Kudos to the girls with enough confidence to rock them :)
I would never wear them, but I have a friend who only wears them. I could never have that kind of confidence. She is happy with her body though. She goes to nude beaches, so those bathing suits are what she considers covering up.