I have one and I love it! I'm a 36B - Maybe small C on a good day and I have the smaller size. It comes with an extra zipper piece, and the velcro in the back makes is super adjustable. It keeps the flanges nice and tight making a good seal for pumping.
I got mine from Amazon in case I needed to return it I wanted it to be hassle free. But I didn't need to!
Ooh! It's adjustable! That's what my version lacked! Go for it!
You can call me JoMo!
Mom to baby boy Joe, born 5/4/09 and breastfed for more than two and a half years, and baby girl Maggie, born 7/9/12.