I bought this pump because of the price and thinking a battery/electric pump would be great for me seeing that I am a working mother. It started out great I was getting the milk out quick and easy, but after using it for only a month it went bad. The pump always got clogged and I had to stop pumping release my breast from the pump and twist the bottle in order for the milk to go into the bottle. When I opened the motor milk had rotted in the pump resulting in the motor breaking. I now have a manual one and I wish I never bought this pump because a manual one in 100 times better.