Robert called ahead to give us time to arrive home to meet him. He was friendly, professional and thorough. He gave us tips to extend the life and quality of our unit which was extemely helpful because we are relatively new to this house and it is an older unit. Robert fixed our problem and was very pleasant and professional. Robert made our day! Because of him we probably won't need to get serviced again for awhile, but when we do, we will happily welcome Robert back to our home.