Things I loved: ~ didn't drown my daughter - she can eat at her pace ~ even though there are 3 parts to the nipple, it's still very easy to take apart and clean ~ due to vacuum pressure being needed, milk does not leak out ~ my daughter switches seamlessly between this bottle and my breast then back again ~ uses the same bottles that Medela pumps use I was worried about trying this bottles at first due to the price being high and seeing reviews about other babies not taking the bottle. I am very happy I tried them. The nipple isn't as hard as some other reviews say, I actually found it to be a lot softer than what I thought after reading reviews. It has a wide opening but it compresses somewhat when your baby latches. Don't let the price scare you away if you are needed a great bottle for using while breastfeeding. If you think about how you don't need to buy any other stage of nipple as your baby grows, it really isn't much more in the long run.