To be honest, I don't know if they actually work.  I simply don't know if I had not used them would my stomach be back into shape, but I wasn't going to take that risk.  I ordered both the black and "nude" color.  I started wearing them about 4 weeks after birth and mostly for when I went back to work after 6 weeks (my job doesn't offer maternity).  After about 2-3 months, the elastic wore itself out.  I found myself having to pull the flap tighter and tighter across my belly.  Maybe that was a sign of losing weight, I don't know.  But they did make me look smooth and "not lumpy" under my clothes postpartum.

Ultimately, they felt comfortable and like I was wearing Spanx, but obviously with the target area being the belly.  These are much more comfortable than Spanx and the company Leonisa actually has an entire line similar to Spanx that I would check out and consider because I felt these products were the most comfortable body shapers I have ever owned.  I'm going giving these three stars only because I can't say that these actually helped to reshape and restore my postpartum belly.  But if you are looking for a product to at least hide it a bit, definitely go with these!