Every time we've called Dial One Schilling and had them service, they've been very good at showing up on time. They're clean, very professional, and thorough. We've had Dial One Schilling replace some plumbing under the house and put in some new piping. We have a very old house and the equipment we have is very old. Dial One Schilling helped us maintain it over the years and have done great work for us that way. We have the same, original products we bought the house with and they're in-use and usable!