Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Dr. Brown to the rescue.

When my neighbor had to have emergency surgery I was asked to watch her new baby. She had two different bottles, the VentAire and the DR. Brown bottles. I was not happy at all with the VentAire bottles. They were difficult to assemble and the baby cried because the formula just wouldn't come out of the nipple. I was growing frustrated and decided to try the Dr. Brown bottles instead and was THRILLED. What a difference. They do take a little bit more time to prepare than a regular bottle, but I think they are worth the time and money. With permission I bought her 5 more of the Dr. Brown bottles.