I LOVE THIS. My insurance and hospital had the wrong fax numbers to each other so my prescription to get a free pump took an extra month. I have a hard let down and NEEDED something so I wouldn't make my baby choke every time he nursed. Right when he gets hungry I put it on the side he will nurse from, squeeze around, take it off and let him nurse. Works like a charm! I have DDD size breasts right now and it suctions and hangs on with no problem. There are reviews that say the measurements are off a lot and I can see a little bit of a difference when I put the access milk in the bags but not enough for me to be totally off put by it. I'm buying another one to gift to a coworker! Love the item.