I received it yesterday, so for efficiency in the long term, we can forget. First size: I make the 40, I took a XL and I really do I think. It already seems quite small when you take it out of the bag, but it is scalable, so it goes, the size is good. Maintenance: It is comfortable, soft, itch, and maintaining good belly. Negative points: - He rides in the stomach! - It happens mid-thigh making a bulge in the back of the thighs, visible even under pants! not very aesthetic, so - Dimpling of the skin shorty mark, give it a bumpy effect on the thighs, not sexy either - The size is not very tight, it does not erase the brand of underwear that door below (because yes, on the packaging, it is marked that it is recommended to wear a thong or under -vêtement below ...) In short, nothing beats a set of abs and glutes. ! I think the real positive point of something like that is that when worn, we know we must move more, do more movement, because it would accelerate the make fat etc. And so we make more moves, and that's motivating. But in any case, I doubt that anyone could lose a size just by wearing it.