Love my Roboclean, bought it new in 2011, still running strong, only had to replace a water separator and now I'm replacing a hose that had a fitting break. In my opinion it's equivalent to a Rainbow, my family has owned those since I was a child and the cleaning ability is about the same. Far superior to any bag or canister vacuum I've ever used. I've never used the floor cleaner portion, but I have it brand new in the box in my shop.
It would be wonderful but indeed overpriced. I like that it has the wireless remote. I've always frowned on hard wired hose mounted switch because of compatibility concerns of the electric connections but with central vacs using a more standardised low voltage switching mechanism I do like that. But what I see? $3500+? I'd be going to join Elizabeth!