Larson was great from the appointment set-up through the tune-up service. Both the office and the technician explained that the appointment would take longer than a normal tune-up. Josh, the technician explained all the work in detail. Their diagnostics indicated that a couple of things on my gas-pack needed to be tweeked. They changed the fan speed and moved a sensor to the sunny side of the unit, finished the normal tune-up tasks and it all checked out great. They are way more tech savvy than others in this category. Invoices are electronic. Payment was electronic. A nice feature was that the office sent an email with the technician's photo and bio when he was on his way to my house. It was a pleasant surprise. I was very happy with the company and their service, and will use them again.