I love these shoes! I have been wearing the fit flops for over 6 months and although my legs have not magically thinned out or toned up, there is a noticeable lift in my rear end. And even better, when i wear them i no longer have lower back pain when walking up hills. I am a fan of them and have seen results, that being said, i have also altered my diet and exercise which may be the reason why my butt looks lifted and pinch-able!
I have two pairs, pink and red, and they're basically the only shoes I wear on weekends for running errands and stuff. I can't say they've done much for me, although I remember feeling a little sore after the first few times of wearing them. But now, they're just so comfy and I wear them for that reason. I usually kick off my shoes first thing when I get home at night, but I forget I have these on most of the time.