We have been clients of this company for years. A subscription service gets us maintenance and free service calls. Recently, they installed a new, more efficient furnace for us, and I was impressed with how they didn't try to upset me or confuse me about what I was paying for. We'd installed a new smart thermostat that was supposed to be very good, but after returning it twice and having three units that caused our A/C and furnace to run simultaneously (which is part of why we needed to replace our furnace), we finally called Lighten Up to verify that the problem was the thermostats. They came, spent an hour installing and reinstalling thermostats, confirmed that the problem was in the popular and supposedly high quality (Google) thermostat, and didn't even charge me anything for it. I love these guys. Brandon, Kevin, and Jon are all super friendly, and they know what they're doing. This year on my annual a/c checkup, Keith and Eric were super friendly and efficient. When they pointed out that the condenser could use a cleaning and I indicated I'd like to get that done, they just asked, "Do you want us to do it right now?" And they did it. I didn't have to deal with making calls and scheduling a different appointment. I love it when things can just get done.