Thanks for the concern. I have never seen the hard rubber ones. The front room (my office and finishing room) will be ceramic tiles.

Anything will be better than what is there now. It has old floor tiles that if you look at them hard, they come up. With dirt. I may remove all the tiles(lots of labor here) and seal the concrete and stain the floor then wax to a fairthewell. We are still a little bit aways from that.