I EP and use a Medela PISA double electric pump that I use with a hands-free bra. This weekend we took an all-day trip so I brought the pump with me and threw in my hand pump too, just in case the battery on the PISA didn't work. Tried the hand pump just for "fun" and it is AMAZING! I got so much more milk from the hand pump because you can keep the suction going much longer to encourage a longer stream of milk. It seriously looked like holding down a hose. I haven't switched to the hand pump exclusively since it takes longer to single pump, but I was really impressed.