I'm very happy with my recent furnace checkup from AA Service Co. Scheduling the visit was easy, and I was given a 3-hour window for the visit (very reasonable). When I told them I wasn't available for the first hour, they were accommodating and made sure to fit the visit into a 2-hour window instead. Robert was an excellent technician--very skilled, professional, and friendly. He called when he was about 30 minutes away so I knew exactly when to expect him, and he did a thorough inspection and cleaning of my furnace and humidifier. He explained everything he was doing, showed me how to access everything I would need (e.g., to replace consumables), answered all my questions, and was obviously very knowledgeable and experienced. He even noticed some strange features of how my furnace was installed (which he also explained), but made no attempt to sell me additional services. I signed up for next year's HVAC inspections on the spot--and only because I asked about it! Overall great service, and I would definitely recommend this company.