Right now i was very unhappy. I have send it back end of the year!
Perhaps now my problems are solved, but perhaps not all. After i send it back there was another firmware update.
The main reason to give it back was the loudness printing generic filament. If you will PLA of course the fan has to speed up, but the fun run at max speed. That is not funny because it is much more loader than normal print.
Perhaps in future Ultimaker will have a smooth working firmware, but not yet.