Pros: Easy to use, very effective, quick let down
Cons: valves must be replaced OFTEN
This was the best pump for me, at the time I had tried several pumps, including a manual medela, electric medela double pump, a first years pump, and a Gerber pump.
I experienced NO PAIN with this pump -- my suggestion is that if you are larger in the breast area like me to remove the silicone thing and just use the pump without it.
I had QUICK let downs with this pump too and not a single issue - it's small enough you can even pump under your clothes. I did have to replace the valve's quite often, sometimes once every two days once I went back to work for optimum efficiency. I would definitely recommend this pump!