I bought two of the Numero Unos that were on sale. I originally purchased a manzip max but it was a size too small, so the numero unos are a size larger. For someone who's pretty heavy, these are the most comfortable binders I've ever owned (although, my only other experience is with a few 997[underworks]s.) The problem is that because they aren't the same material most binders are, or just underworks are, they don't compress as well. I've noticed that no matter how flat my chest is, I don't usually pass, so it doesn't matter how flat I get. But, because I'm heavy, when I do pass, my chest helps, because I "arrange" my chesticals to look more pec-like, or male oriented.
Bottom line;
Only get a mansculpture IF you have a smaller chest, or are heavy and can afford some moobage.