Pros: does what it should
Cons: messy, difficult
I got these since they take up less cabinet space than the storage bottles and they seemed like a great idea. I really tried to like these. I did. But the crinkly noise and hard to get on and off of the pump without making a milky mess was just too annoying for this mama. The bags also do not stand up like they should. I am sure some mamas out there do love these, but I am sticking with the Medela freezer bottles.