Thinking of one of these for our house. To supplement main beast if a vacuum. But how noisy are they? How good are they? Can't decide whether to get top of the range one ( iRobot 980 or Neato Botvac Connected) or just a basic one . Would want to use it most days to keep Down dog/cat grubbiness really but daughter is chronically sick and hypersensitive to nose ( so I can't vacuum her room daily like I used to).