Hi hellokittybaby, I have tried using manual pump for my 1st one but the results wasnt that good. you need a lot of strength for the manual one. That is how I feel. For my second one Im using medela pump in style advanced double electric. N the results is fantastic. Im selling my medela breast pump for 428 ( usual w promo is 699). Ive used only 4 months so if you are interested pls pm me for the pictures.