Overall, R&D Heating, Cooling & Electric is very good. They installed my entire HVAC system. I had a system in place that was giving me trouble, so I had it serviced by another company. On his way out this guy said to me, "Oh, by the way, your system isn't working at all now. But we have a salesman in the neighborhood." About an hour and a half later, the salesman stopped by and quoted me twenty-three thousand dollars for a full replacement so I threw them all out of the house and started asking around. My neighbor used R&D and my sister also used R&D. I took a look at their installs and like their workmanship, so I called R&D for a quote. I ended up hiring them and I'm as satisfied as I had hoped to be. Now that I'm in the maintenance phase, I hardly ever see the same guy twice. I know they are a big company, but it would be nice to see the same guy regularly. But I guess if they're all trained the same and know the same stuff, it's okay. I would definitely recommend R&D Heating, Cooling & Electric.