If you live in an apartment or building with a water heater from 1901 (like me) you know how long that sucker takes to heat up the water. The Shower Start is a little device that can detect when water is warm and turn off the flow. Confused? Yeah, me too. Apparently you turn on the water then go about your regular business of making breakfast, shaving, whatever, and the Shower Start will flip off the water flow when hot water is detected. When you are ready to hop in just flip a lever and rub-a-dub-dub. No more wasting water or time waiting for the vintage water heater to do its job. $50.