Ordered this to use with my Ameda Finesse. It works wonderfully! My pre-pregnancy bra size was a 34G, I'm currently probably at least an H cup size now that I'm nursing/pumping, and I ordered a Medium size for this pumping bra which fits perfectly. This bra would never work as a bra by itself, but fits easily over a nursing bra or without a bra at all for strictly pumping.
It takes a few tries to get good at fastening all the hooks on the front, but honestly, Velcro probably wouldn't hold it shut around me anyway. .
The material is comfortable and the pump fits through the holes easily. This bra could probably be used for most breast pumps.
My only complaint is the price! Really?! Slap a brand name on a stretchy piece of fabric and charge whatever you want for it.