WELL
i bought the black one.....and it made me as flat as other very strong binders, but i'm rather flat-chested. then I ordered the same thing in the limited edition blue color and it did nothing for me, didn't hold anything in place, serious bouncing issues. i ended up exchanging it for another black one. that was like half a year ago and the blue one seemed to be a newer/special edition model. so if the black ones are still the same, they're quite nice actually.