I asked JDL to send over HVAC technicians on four occasions. The first request involved installing a digital thermostat to replace an analog thermostat that had been installed some years before I bought this condo unit. The technician arrived on time and competed the job very professionally. When, later the same day, it became clear that I didn't fully understand how the new thermostat worked, JDL promptly send another technician to check things out and go over proper operation of the thermostat. A few years later, when the HVAC system wasn't working properly, JDL sent a very experienced technician who carefully checked out the system and provided some much-needed maintenance. When, a few weeks later, a JDL technician concluded that the aged system was beyond repair, the technician, together with office staff, generated some options. JDL staff also discussed financing options and even put me in direct touch with one of their trusted lenders. Once I settled on a new system, JDL delivered the new system and two technicians spent an entire installing it. They were respectful in every way and before leaving verified that the system was operating and that I understood how to use it. They also removed all parts of the old unit and all the packaging associated with the new unit. I was and am completely satisfied with their service.