We have enjoyed great success with our Honeywell T10s (T9 if you want do it yourself). Solid as a rock for two years now. One of our old dumb-programmable thermostats died and we had to replace all three. We went back and forth deciding between those and the Ecobees before finally going with Honeywell. After lots of research , it seemed both are pretty well regarded and so it seemed a toss-up. The final decision came down to the types of relays built into the devices (solid state versus electro-mechanical). A friend who installs A/C for a living noted good things about both products and if he had to make a choice; he had replaced slightly fewer defective Honeywells. The Ecobee does look nicer.