I've been using a Medela PISA since June and like it, but wanted to try to increase my milk supply, so I've decided to rent a pump from the hospital (I pick it up tomorrow). Unfortunately, they do not have the Medela Symphony...bummer...so I'm going to rent the Medela Lactina. Has anyone used both the PISA and the Lactina and have any opinions on performance, etc. How do they compare? Is the Symphony better than the Lactina? Any thoughts, opinions, etc. would be appreciated! Thanks!