I wasn’t sure what to expect with a robot vacuum but the shark has exceeded what I thought possible. It somehow maps out the rooms and builds a map, then vacuums daily. I have a Shepard and the fur is a challenge that requires lots of cleaning. The shark explores and leaves nothing behind without a thought. It even gets into corners and against walls. The mop is even better and leaves the floor clean and dry. I can never go back to doing it myself.