Ckeck out the photos of my live room as well as a bunch of others on
www.fmdesign (trillium lane and Bluejay for example). We used Kemiko Concrete stain and works great. As long as the slab is kept in good condition and washed well before applying the stain it looks great. A few area rugs dampen reflections when necessary. Remember the floor is only one surface. We opted to use wood on walls and ceiling clouds. The room sounds great.