I purchased Dr. Brown's bottles before I gave birth to my son and I have never had to try another bottle. I thoroughly researched different types of bottles and asked all my closest friends with children what their thoughts were about these bottles. They all raved about Dr. Brown's so I decided they would be the first bottle I tried for my son. I couldn't be happier with my decision! My son has NEVER spit up once since the day he was born and he has never had gas or been colicky either. These bottles really do control air bubbles and I feel safer that they are BPA free (even if the jury is still out on the potential dangers of BPA). The price of these bottles is in the higher range but they are worth the little bit extra you will spend. The only drawback for me is that they are not convenient to clean. The bottles consist of five parts, three of which need to be cleaned with a special and very small brush. Dr. Brown's does make an accessory basket for the dishwasher but it can only fit parts for three bottles. That being said, I still would never switch from these bottles and would recommend them to all new moms.