I like this one very much, as it is very atypical: the front is very low as usual, but still covers everything (or almost, it depends), but the back is completely different from other strings or thongs, that cover more or less of the top of the cheeks. Here a small V just divides the cheeks into two, what makes it very sexy.
I already got compliments from two girls, from my wife and from a friend of her that surprised us at the pool.
I would like to see more bikinis like this.
I bought these for my husband 2 sizes larger than his normal size. He has a large culo on his otherwise ectomorphic frame. The low V back doesn't really conceal any of it (other than making it legal to wear on the beach) as he juts out completely above the swimsuit in the rear. It's amazingly beautiful and I can't wait from him to wear it to the beach ! Highly reccomended !
This one fits differently. To get the back V high enough to stay in place, the front becomes very, very low and exposes some shaft - which may a feature, rather than a bug, depending upon how you look at things.