I have the device since 1.5 years in use and it runs perfectly like the first day. The milk foam is firmly phenomenal, almost too tight. One should point directly after the end of Aufschäumfunktion select the milk foam pour, so you still rausbekommt him well. This, however, applies to other milk Schaumer, also I have also a Melitta Cremio frother for the office. Advantage on Aeroccino is particularly easy cleaning under the tap. In operation, no dairy slip into the mechanics of how it can happen with other devices that have the drive in the lid. That's me sympathetic and hygienic. The disadvantage is certain that you can not lather several portions behind the other without what burns. But is also the Melitta device case. I manage myself here, as I previously warming up the milk in the microwave and then the Cold program used for foaming. Then burn nix. The milk foam is then a little softer, I guess even. Stop is unfortunately a step more with preheating ...