K.S.
I have no experience in hand pumping, but I agree with the manual pump. I was given an Avent Isis when my son was born 4 years ago. I wasn't able to breastfeed, so packed it up. When my daughter was born in Nov., it came out of storage. I've had to replace a piece, but it works 100% better than the electric one I've used in it's place. Granted the electric is not "hospital grade", but the suction is bad & I don't get that much from it. I have gotten double & sometimes triple the amount from the manual. I can't wait for the replacement piece to get here.