Our technician, Daniel, came yesterday to repair a problem in our box, then did a safety of the whole system and made several recommendations for upgrades, some of which we agreed to. Today he came and completed those. He was with us for much of the day--there were several upgrades, and in order to complete them he spent quite a bit of time driving around, trying to find parts in local stores (Home Depot, etc.), without a lot of luck at first--to his credit, Daniel never gave up, finally located the required materials, and completed the work. He is personable and explains things clearly, which made him a pleasure to work with..