Purchased to replace another manufacturer's unit that I could no longer get parts for.  Installation was fairly straight forward only complicated a bit due to the existing location of the water supply valves.  The SS finish looks real sharp in the shower, much better than the anodized aluminum of the previous unit.
The calculated dimensions for the bottom of the unit off the floor (20") was followed but being 6'1", I may have preferred it about 3-4" higher to make the body sprays higher.  Others in the household are probably content with the installed height.