Decided to update our 20 year old non-programmable thermostat. Did a bit of research and this one from Lux stood out. It has a large easy to see display with backlight, is programmable for all seven separate days with four time zones per day, and works even with heat pumps.And it's very reasonably priced.We have geo-thermal heat and cooling, and this works perfectly. The wiring up part worried me, but I found the included diagram that matched mine, added the extra jumper wire as depicted, and was in business.It's great to be able to see the display from far away, and even better to know we're saving energy by having it reduce heating while we're away, sleeping, etc.It's easy to override the program if you need to. This thermostat can do a lot if you want to learn all of its capabilities.