So we can really and fully recommend the unit. The bad reviews I can not understand; since you - quite frankly - for the money not a high-tech device that heats a bottle or the broth to 38.5 ° C, expect. So it would be meaningless points by grade numbers to replace because different bottle materials (plastic or glass), different filling heights (150 ml, 300 ml, ...) and also differing consistencies (water, milk, porridge) exist and thus always different temperatures arise. Thus, the solution to have found with this unit is his personal attitude, understandable. After breastfeeding, I've been looking for a way just as fast and easy to prepare the night meal for our baby. This is the thermal Constant just great. We fill the unit to the top with water, make the water-filled 300 ml plastic bottle in and turn on point 3. Can the whole night the thermometer to stand as more nachmisst and possibly warming up again. Then when our favorite is hungry, just mix with water heated preparatory milk powder and into the baby's mouth. Not even take 10 seconds! Just awesome! From us 5 *****!