I absolutely hate this pump! I went through 3 of these because I wasn't able to get my money back and could only exchange. The motor broke twice and one time it suctioned in and never released. Instead of exchanging it for a fourth time, I just threw the whole thing out. The part that attaches to the motor/handle and the piece that allows milk through are impossible to clean. Eventually, on all 3 that I went through, the milk builds up in the piece that attaches to the bottle (only takes a few pumps to fill this up) and you have to break suction for it to filter through. It continues to do this for as long as you're pumping. If you don't realize that the milk hasn't gone through, the built up milk gets into the motor/handle and leaks out through the suction power control. The massage bubbles on the cup are uncomfortable and only irritate your breasts. The suction dies down almost immediately making pumping take so much longer. This pump is such a waste of money. Buyer beware!