Pumps and I don't often get along, but when I am nursing I tend to leak a lot on the other side. With this pump (that came with my dual electric pump) when I have extra time and nurse my baby girl, I can pump on the other side. It's much easier to hold and to pump - even with my tendinitis - with this pump as opposed to my other two manual pumps. (An M brand and an A brand.) SO much more comfortable to pump this way. I don't get much with it - but I don't get much with the electric dual pump either. I'm working on it, though...I'm determined to be able to donate extra breast milk since my daughter won't take a bottle at all or take it mixed with her cereal...I'd be pumping to relieve engorgement anyway.