We use this company for quarterly service. The technicians are very nice, and always do a good job. We have had some frustration because they are supposed to automatically bill our CC, but they do not, so we end up paying several months after the service has occurred. It doesn't seem to bother Holders, no late fees or anything, but we like to pay everything on time so it annoys us. Their service is good, though, and we continue to use them.