I EPd for ten weeks with an ameda purely yours (luckily we were able to transition to EBF at that point). It was easy to use, comfortable and effective enough to meet my needs at that point. I also have an Avent Isis manual pump for occasional expressing. I got both on recommendation from a LC and was happy with both for what they were designed to do. After about 8 months or so I stopped responding to pumps altogether though and although DD would drain a breast in five minutes, I couldn't even get half an ounce from both breasts combined after a 45 minute pumping session. I don't think it's an issue with my pumps, my body simply responded differently and I stopped feeling full and couldn't hand express either.