I'm 5'2" and weigh 135, so there's not a ton of stuff around my waist, but I'm 61, and everything just seems softer and fluffier than it used to be, even though I walk and do yoga/pilates & Wii Fit regularly, so I read the reviews and finally decided to give this one a try.  I haven't had on a "girdle" in 30 years, so maybe I've just forgotten how it feels not to be able to breathe comfortably.  I got a medium and after some gyrations and a bit of a learning curve, got it hooked up in front.  It does give a nice curve to my waist, and I immediately measured 1 1/2 inches smaller :), and when I walk, I have better posture.

The down side is that I work at my computer, and I cannot sit for very long with this cincher on.  I think part of the problem is that one size doesn't fit all in length.  It pushes my cleavage up where God never meant for it to be, because it's long on me.  A taller girl might have no problem.  And because my waist is shorter, the narrow part extends up over my ribs, and it actually gets painful when I sit, and I find myself panting little short breaths.  Also, there's the issue of where the fluff goes when you squeeze it in.  I was feeling pretty good, looking in the mirror, till I turned and saw the part bubbling over in back.  That just would look scary with a fitted blouse on........Also, the part I had hoped would be flattened, my abdomen, doesn't seem to be affected at all by the cincher. It's still a pouf, with or without it. I wouldn't call it magical.

So, I'll probably keep it, but I won't be wearing it daily as I had planned.  I was already planning to lose 5 pounds, and maybe then it will fit more comfortably, and I'll probably wear it to some Holiday gatherings.