My experience was that they are super uncomfortable and after 9 months of being pregnant I didn't feel like torturing my body with discomfort any longer I think the results are dependent on you being really committed to wearing it. Personally I found I'd rather do 5-10 minutes of sit ups a day for the next few months than wear that thing around the clock while trying to breastfeed etc. I have a few friends that bought them, but I have yet to find someone who used it.
I bought a Bellefit and used it for maybe 4 days after birth, I liked how it sucked everything in but it was uncomfortable so I stopped using it. My belly shrunk back to the size it used to be after about 4 weeks without it. In my opinion, save your money.
Ordered one. Wore it for maybe an hour. Like PPs have said, they're uncomfortable. And by that point all I wanted was to be comfortable and cozy with my baby. I felt like it made the swelling downstairs worse.
Re: Tummys After Birth!