Guest bathroom, Jamestown, RI
Turning the handle controls both on/off and temperature. It’s efficient, but it’s pretty tough to avoid a visit from the freezing water fairy as you twist the handle to “off.” I tried a few times and was not fast enough to avoid a very cold conclusion to my shower experience.
Off-topic bonus points, to this shower, however, for the aesthetically pleasing Three Mario Heads arranged on the shelf.