I was frightened and apprehensive about the day my furnace would decide to go to the furnace Cemetery. Well that day happened on Friday October 13th. The furnace clearly malfunctioned and I was forced to replace it. On that very same day I use Thumbtack to locate a technician, in less than 72 hours I had been contacted by Mike at TopKnotch, had an appointment scheduled and had a brand new furnace and thermostat installed. It was absolutely painless, definitely affordable, and literally one of the most positive experiences I have ever had with a home repair.