I was right on the edge of sizes so I got the larger one and I'm not sure if that was the right move. It fits and smooths but doesn't act as a girdle in any way. If you are looking to maybe fit into a smaller size or something (I have a bridesmaid dress that I got fitted months ago), you will probably be out luck. i won't wear it with that dress because it doesn't do anything for it - but would wear it with some closer fitting dresses just to eliminate VPL and look a little more streamlined - it does that well. Also - the leg part goes to about an inch or two above my knee (I'm 5'7" for reference) so on shorter dresses or even with a slit, this might be noticeable. Pulling the legs up just make the suit bunch, which defeats the whole purpose.

Follow Up: Wearing this more often lately and loving it. It doesn't constrict, just smoothes and can make a night and day difference with many of my clothes. Great buy, would definitely purchase again.