The product comes with a bunch of accessories and is easy to use. But you have to follow the instructions exactly and from cool setting. I tried sterilization first, which worked great. And then I tried the warming function and the liquid turned piping hot! I think because I went from sterilization to warming without changing the water? So I dumped out the water and tried again, again piping hot! So I dumped out the water, unplugged to let the warmer cool off, and came back to start over and follow the booklet, as in put in certain amount of new water, and it worked. The liquid was still warmer than I usually give my baby, so I usually take it out before the beep. The audible beep when it’s done is one of the pluses.