Thinking about a Roomba. Mostly hard floors, probably 95% of house. Would you recommend yours? Will it do the whole ground floor if I leave doors open. Or will I have to set it up room by room? Will it be able to navigate around a dining table with 10 chairs i.e. Lots of legs to deal with! Or is this just a waste of money and I need to get off my butt😳. Any feedback gratefully received!!!!