I'm so glad I ordered a few of these!  They help support your growning belly and help keep your pants up.  I was able wear my regular pants even when they didn't quite zip, button or snap anymore.  I also like to wear this with maternity pants that do not have the panel.  I own a couple of these in black and one in creme brulee.  These colors have been versitle enough that I can wear one with every outfit.  I was unsure which size to order at first because I am in between on their size chart.  I went with the smaller size, after reading some reviews, and that was the right choice.
The only problem I had was finding a hole in one of them (before I ever put it on).  I recommend inspecting these closely for holes as soon as they arrive.  My problem was quickly resolved.  I sent it back and got a refund.  (and ordered a replacement in the mean time!)