I bought this warmer thinking it would help me with middle of the night feedings, but after testing it out once, I promptly returned it. I should have listened to the reviewers and not thought they were being petty. This thing has no auto shut off, the user has to set a timer for how long to leave the bottle in and even though there is an "off" switch, you still have to unplug the machine. Not very helpful at 2 in the morning when you are half asleep and have a frantic hungry baby. For the amount of money I paid, I would have expected much more than a glorified hot plate. I ended up getting the First Years version for less money and while that one is not perfect, it beats the Avent model. Too bad too, because I have been happy with the other products in this brand line.