Overall, Service Experts seems to be a good company with which I'm satisfied with both their product line and service people. However, nothing is perfect.
I was told they don't use 3rd party installers, but they sometimes do, as in my case. These installers were on-time, neat, and friendly, but they did not configure the furnace correctly. Two weeks after installation, my thermostat broke (not their fault, just defective). During the replacement process, the technician noticed that the blower motor speed was incorrect for the A/C unit, so he adjusted that.
At my first annual service call, the technician noticed that the furnace was not configured for two-stage operation with my one-stage thermostat, so he corrected that. It's been a mild winter, but I've not received the benefit of a two stage furnace due to incorrect configuration by the 3rd party installers, and the first repair technician missing this error as well.