My girlfriend and I have used Ni-Ridge on a number of occasions (the furnace always manages to go out on the hottest day of summer and the coldest day in winter). Mike Bartley, owner, always returns our calls promptly and provides next day - if not same day - service. He arrives on time, is friendly, and doesn't leave a mess behind. Best of all, once the problem is fixed, it's fixed (until some other part breaks the next time). Highly recommended.