I installed the GE Water Heater Timer Model 15207 last night. It works - does what it says. Now, I just have to determine the best schedule. I love how it is granular - can come on during the day, etc. I've started out by shutting off power to the WH at 10PM, and turning it back on at 5AM. I may shut it off again at 10AM, and pop it on again for a half hour around 2PM, then back off 'till 10PM, I'll post an update on KWH savings.