I'm 30 weeks this week and just got my bellybra.  I'm not a fan of the name... but I love the product!!  I was getting some cramps in the upper part of my belly by the end of my workday and the first time I wore this all day, it was such a relief!  I didn't have cramping at the end of the day and my back felt better too.  I've only worn it a couple of times so far but already decided I'm ordering a 2nd one.