This product works well if you use the pre programmed On/Off settings that come from the factory, but, trying to customize the settings is a layman's nightmare. The instructions refer to buttons like "edit" that don't exist. The propeller head who wrote the instructions definitely wasn't thinking of the bone heads of the world like me. Very frustrating.
I renovated my bathroom just so that I could enjoy the pleasure of having heated tile. It is the best!
This is the second SunStat Pro that I have installed. The first was the PRO I model and the second was the PRO II. Both worked well and were easy to install and program The PRO I was tough to take apart without fear of breaking some connector pins but PRO II was better.