my daughter be almost 10 month old and I have another pump that have serve I well since I go back to work when she be 4 month old . I use that pump 3 time a day at work and over the last month think my supply be drop . a friend recommend that I switch pump because she think my breast might be get `` use to '' a certain pump . I do not know if this be true or not . I swap out all the part I could in the other pump , but I be still able to express plenty after a normal pump session . today , I try this pump for the first time and my output double from what I pump at the same time yesterday ! yesterday , I pump about 3 oz total in one sit , today i pump almost 6 ! three thing I do not like about this pump . first , there be about double the part to clean and disassemble versus the other pump I use , a Medela . second , I be not sure I like the activation . you hand pump a few time to `` show '' the unit how you want to pump , press the blue button and it mimic you pump speed . I like to turn it on and forget about it . third , I wish there be a battery pack so I could take this with I overseas . it work like a champ and it be comfortable , though !