Corey Green, who was my technician today, did an outstanding job servicing my furnace. He took the time to answer any questions I might have about my unit, and he even, in simple, non-technical language, explained the workings of my furnace, so if there ever was a problem, I might be able to better describe the problem to First Call. This would also make the technician's job easier to come better prepared if they have an idea from me, the customer, what the issue might be. Also, Corey took the time to show me how to set my thermostat to the daytime and evening temperatures I wanted. This was important for me so I can be more energy efficient with my heat, my thermostat and furnace. Thank you Corey for your excellent customer service today!