First Call Heating And Air Conditioning

In March 2018 our heating furnace suddenly stopped to work. The outside temperature at night -20C, not a big pleasure. I made call few companies and "First Call" is only who did not put me on hold OR did not forward me to somewhere else. They just listen to my case and the salesman came to my house less than in an hour. After a very detailed discussion of the situation, I made the decision to go forward with the replacement of the old (I am not sure exactly, but something about 15-20 years old) system with new one. They have a very affordable financial solution to finance an expensive replacement. Technicians with equipment arrived the next day and worked for 8 hours until the heating started to work. Next day another few hours to finish. City inspector did not accept the job in the first inspection, because of the distance between a hot tube and a wall, so they had to come in a few days to fix it. But this is a very specific situation because I have a very tiny furnace room in the basement.
During the first month of new furnace operating, I have received a few error messages from my LENNOX smart Thermostat so that I called the "First Call" again - they replied right away and scheduled a service appointment and replaced the thermostat. After that, I did not have a problem so far.
Summarizing my essay, what I liked: Quick response to my problem, the salesman has the skill to explain everything with details, offering a financial solution, get city permission themselves, after installation - fast service call response, under warranty parts replacement - quick and simple.

March-2019:
Received few e-mails and calls with a reminder of maintenance.
Called back, scheduled appointment.
In appointed day and time a technician came, spent 1 hour to clean furnace, fixed some errors on Smart Thermostat.
All good, no complain so far.