This machine is amazing and worth every penny. Making bottles literally could not be easier. The funnel where the formula comes out has to be cleaned after every 4 bottles, which seems like it would be a giant pain and take too much time. But it honestly takes less time than preparing a cold bottle of pre-made formula and warming it up. I actually timed it. The mini does not take up much space at all and really makes preparing bottles for baby a breeze!