B.L.
I've used the medela pump in style (first baby), the whisperwear pump (second baby), a hospital grade pump, and the avent hand pump (both with the third baby). hospital pump was definitely the fastest and got the most milk, and I could do both sides at once, but I liked the hand pump best, especially since I wasn't pumping much -- I'm at home with my kids -- it was basically for the occasional night out or so someone else could feed him a bit. I still use the pump occasionally (my third is 17 mo now) but it's basically only for my own comfort when I'm away from him for long enough that I get too full, like the occasional night away or when I'm attending a long birth as a doula.
-B.