This was my first experiance with an electric pump, and was awful! The motor was very weak and it did not provide the proper suction. I called the company and told them of my complaints, they sent me a new motor and new washer rings (the rings in case the suction was being broken) however neither helped. This pump was loud, and painful and did not allow me to pump enough milk. The suction release is manualy operated but the motor could not keep up with the number up times I would need to relase per minute to simulate my baby's sucking, witch made let down even harder! I do not suggest to anyone to buy this product.