I needed to have my air conditioning unit cleaned out, so I called up Glenn Mechanical to do it. This was the first time I ever used them. They cleaned the coil off for me, and now everything works fine. They showed up on time, and I really like the fact that they called several times to check in with me on when they could be there, due to my schedule. Most companies I have used only call once, and do not stay in contact as well as Glenn Mechanical. I really appreciated that!