I think they do a great job. They have been in business for at least twenty years now, so you know they aren't giving people bad service. The first time Charles, one of their technicians, was here was to clean my heater. Everything's been working fine since then. Charles was so nice and friendly the first time I worked with him that I asked to have him back again for my next service call, and they were happy to oblige. I like that you can request someone who you enjoyed working with, and that they provide that option to their customers.