Heard great things about these bottles until I used them for myself. Main issue I had is there's too many parts involved, at least 4 different parts to wash for each bottle. As a busy mom, I didn't have time for that. Also the necks of the bottles are VERY narrow, almost to the point you can't hand wash them.
BUT the good thing about these was the anti colic system, it worked very well for my sons reflux
After trying these, I switched to Tommee Tippee bottles and I'm thrilled.
Sadly I would not recommend Dr Brown's bottles