Pros: let down button, convienient bag
Cons: not a closed system, you can only control the strength of sucking
I bought this pump because everyone else had it. I had an Ameda pump but wanted the pump in style because I thought it must be better. I don't like it as much as the Ameda. It is not a closed system, so milk can back up into the tubing and get into the motor. On the pump in style, you can only control the strength of suck (other than the let down button). On the Ameda, you can control speed and strength. I do like that the pump in style has a let down button. I also like the bag that the pump instyle comes in, it makes it easier to pump. You just unzip it and plug the tube in. I also have problems with the little yellow connectors that are in the end on the tubing that you use to plug into the back of the flange. They sometimes fall out, and since they are so small...they are gone.