This a true, one year of use, not sponsored reviews. If you go above the max line, the milk will overflow, run down the sides and get into very hard to clean components at the bottom. You must wash it immediately after use or layers of milk will bake into the wall. The lining scratches easily, I have been using a plastic, flat edge spatula to scrap off the baked milk and it still gets scratched and looks terrible inside, but I'm not going to buy another one because it still works as it should. You have to dump out the milk almost immediately or the liquid on the bottom will pour out and the froth will stay in. Also, the frith takes about 20 minutes to dissolve into the coffee so if you drink it fast the froth will stick to the side of your cup, so you're never finishing a hot cup with the foam. If you make one cup after another, clean the frother with cold water to lower the temperature because more milk will bake into it and more foam will be produced. My advice to Phillips is to make the device larger with a lining that doesn't scratch easily.