I have been EP'ing since my son was 3 days old due latch issues. We tried for a few weeks after, but found that EPing was less stressful for both of us. I have been using a rented Medela Symphony but now am looking to purchase a pump. I have been looking at the PISA and am just wondering if it is more portable and as powerful as the Symphony. Does the PISA have a battery option? How heavy and bulky is it? I don't think I need to go as small as the Freestyle and have read a lot of reviews about leaking issues, etc. with it. The Symphony is huge, bulky and I have to use a power converter when I want to pump in the car. I would like something that is smaller and more portable, but I want to make sure my supply isn't affected.