The technician arrived on time, explained the work and preparation that would be done, and immediately got started. Within a couple of hours the vents and furnace were cleaned and the system was back up and running. As the vacuum is outside in their truck, it was no louder than a regular vacuum, minimizing the stress on the cats. There price is on par with other companies but where other companies tell you what they are going to do, Alpine explains how they are going to do the work.