...and I know it will be worth it. Just made a purchase of Herpstat 2 x 3. With shipping, the total was close to about $650. Ouch. My currently t-stats are working but I need this peace of mind in the event that they fail ("you get what you pay for"). I hope they are easy to use as I am not very techy savvy. What to do with the old t-stats? I am using Zilla and Century brands for the old ones.

What has your experience been like? Did the fail safe work?