Its design is pretty cute as to its use is really very simple. It heats the bottle very quickly and automatically stop is really great .. Depending on the amount of milk heat the amount of water in the tank is adapted and used it becomes really very simple. Only small downside, the Avent bottles will not fit in it .. I am forced to heat the water in a glass bib and then reverse in Advent .. Otherwise apart from that it is an article that I recommend for a small price.