I recently had my furnace and ducts cleaned as well as my dryer vent.
The technician was friendly, did a fantastic job and offered me advice on how to reduce dust in the house, replacing my dryer vent, telling me my furnace would be good for a number of years yet.
He was pleasant to deal with, provided excellent service and advice. A person so rarely gets good service, I feel it's important to highlight when we do.
I would highly recommend Sears for furnace and dryer vent cleaning.
10 out of 10!