WOW! I read some of the other reviews and thought this would be worth a shot after 2 months of trying to tempt my breast fed 4 month old with various bottles, teats etc trying every trick in the book with no luck. The bottle arrived yesterday and i tried it first thing this morning, worked like a dream first time as it mimics the sucking technique needed for breastfeeding so it is different from all other bottles. If you were pulling your hair out like i was as date for going back to work etc was looming, this is def worth a try, so simple, no need to sterilise bottle etc as it has internal liner bags for milk. Just BRILLIANT! I just wish I had discovered this sooner.