I had problems breast feeding and decided to exclusively pump.  I had an electric pump that was super slow and loud.  I had a friend tell me about this pump, so I bought one secondhand and LOVED it!  It is so easy to use.  I really had my doubts since it's a manual, but it works wonderfully!  Perfect suction that actually got more milk to come out than my electric.  I even used the silicone cushion that goes in the cup on my electric to make it more comfortable.  I used this pump every day all day until my hands starting hurting like I was getting carpel tunnel.  I guess that's the drawback...