We've been using ours for about one year. Even if I work from Home most of the time, I see no problem with it interfering.
I have it sweeping/cleaning a room at a time, closing access doors to that room and voilà, I can continue to work at my desk, no problem. Plus, our S9 is not that noisy.
Only gripe I have is that I must keep it super clean, empty the dustbin each time it finishes a room is just one move, clean the "broom" (having two long haired ppl in the house tends to clog it) keep clean the mop and the rotating brush as well. Basically after each cleaning sweep, it needs to be thoroughly cleaned, otherwise on the next run it will start to behave oddly, like stopping in the middle of nowhere claiming to be stuck...The funniest thing is that , to clean it, I must use our "normal" vacuum cleaner :-D