I used OneGuard Home service for upstairs AC that is not working. I requested service Nov 07 2017. And service technician come to my house and replaced the circuit board Nov. 15 2017. Luckily, it is not hot summer; otherwise, 8 days without AC in Texas is unimaginable. After the technician left, I noticed that the thermostat was also replaced, downgraded from a programmable version to the bare on/off version. I called OneGuard and OneGuard informed that it is their policy. I am surprised to learn their narrow definition of "compatibility" and also the rude service contractors they are using.
Update: After my initial yelp review, OneGuard home quickly contacted me and asked the contractor to replace my thermostat with the programming feature. I am pretty happy with their action.