I had already bought for her big sister, and stayed faithful to them because I was very satisfied.
My daughter takes the well from birth, while she eats overwhelmingly in, so they appear to be effective for "imitate" breastfeeding. They are easy to handle thanks to their shape. The flow seems to meet my daughter, she makes about the same time to finish his bottle to suck the breast.
No colic for my daughter so I can not comment on their effectiveness at this level.
In short, I am satisfied and would probably those bottles if I have another child :)
