They're all hospital grade as well, and in my opinion as well as many other exclusively pumping mommas that I talk to, are a better choice over Medela as it is. only negative I have for them is that finding spare tubing and such is a pain in the butt (Avent bottles do fit the flange piece so that helps). I have the S2, got it a year and some odd weeks ago, right before I had to quit pumping for my oldest, and I bit I used it for her, I LOVED using it. I'm now 97% of the time pumping for my 2 week old (stupid cracked nipples don't want to fully heal), and I'm using my Spectra. I absolutely love it compared to any Medela pumps....my sessions don't have to go as long, it automatically turns off after 30 minutes. has a nightlight on it, and in 30 minutes or less, I usually get a combined amount of 10-20+ ounces per pump depending on time of day and the anount of time between my pump sessions.