Anyone have 1:48 "Dollhouses" on their layout?

Recently I stumbled, somehow, on an ebay website for 1:48 scale dollhouses, with dozens of types and sizes. Then I found Amazon sells many. All sorts of furniture and stuff is available, too, along with building summplies like contact paper for flooring and roofing, etc.

They look good in pictures, but I have never seen one.

Anyway, anyone ever used one of these? They are O-Gauge scale.
The biggest in the photos below is a bit more than 12 by 12 inch footprint, the ads say.