OK, I'll fess up. I tried one, (without the lining, rubber only). It did have some effect, but how much is hard to say, as I was (inconsistently) using corsets at the same time. I'd wear the rubber one when I was going to be doing something that I knew would work up a sweat. Stayed in place, even with a good layer of sweat behind it, but you had to wash it after every use. Just a good wipedown. Wore it enough to eventually start pulling the fasteners out, so tossed it. If you don't keep it clean, you're just forcibly pushing and rubbing all the prior sweat (and whatever else) right back into your dermis. And if you don't clean it, then overnight all sorts of wonderous little things will start to grow on it. Unfortunately, either due to my age, (or something, maybe, that I've started adding to my system), my skin has become too sensitive at the pressure points of these sort of devices, and my corsets are in storage. Have to even be sure bras don't fit too tightly. Results in small, itchy, terribly annoying patches at said pressure points. Can take a couple weeks to go away, so trust me, I'm quite aware of what I wrap any part of me in, anymore. I would have to say, overall, not worth the money, and mine at the time was only around $25. At $50 or so now, just an even larger waste of $.
Having said that, I know someone, (or someones), will just have to try it, so Good Luck, and let us know how it turns out! Patti