Ok so let me start off by saying, EVERY person I hear talking about bottle warmers talk about how they don't heat up enough or go out. I have used this for 2 years, 3 children. It still gets REALLY hot (if you put too much water in it, which is unrecommended). It makes it convenient that you can leave two bottles in the back cooler during the night or if someone is baby'sitting. These are also two water store units on each side so you don't have to go get water each time you use it. Be careful to pay attention to the water amounts as not to get your milk or food to hot.