We have found that our child has taken to these nipples with ease compared to the nuk bottles they clean up well in the dishwasher and are easy to put back together. It's nice to be able to swap nipple hole sizes without having to buy new bottles. We have noticed that when using the dishwasher they do get an oily like film on them so my wife hand washed them about once a week. I would recommend only buying a small number of bottles until you can see whether or not your child likes this nipple style.
It is very soft and easy to clean.