Silent. Suitable for an apartment of 50/60 m2 for autonomy. Dust tank difficult to clean in the presence of animal hair (dog): to empty it, use water after each use because the dirt remains trapped in the container. tank abstraction / insertion and engine insertion difficult for people with serious myopia. six-month warranty not acceptable Up date my review today 15 july 2020: I found out how to remove the inside of the dust collector. was stuck. now it is easy to clean and therefore easy to use. for the above I add a star, my previous rating was wrong about that 4stars.