They are the most comfortable underwear I have because they are perfectly shaped to fit under my belly. I can still fit in my pre-pregnancy underwear when needed, but the extra comfort is worth the cost of a week's set.

Note on size: I ordered the extra large, which the description says is for U.S. size 8-10. They fit perfectly. Pre-pregnancy, I was a size 4 in Banana Republic sizing (which uses vanity sizing), maybe a 6 in some stores. I bought this underwear at 5 months pregnant (when I had barely gained any weight, but it all went to my belly and I had to use a maternity band to wear my pants) and they are still good at 8 months (after gaining 20 pounds).