Lynn, with Cool Guys AC, is great.  My appointment was at 2:30 and he showed up right on time.  He did an inspection on my AC and made sure it runs smoothly in the hot AZ summers.  We have used him in the past and he is honest and doesn't try to fix things that aren't broken.  If something is wrong with your AC, or if you just want to make sure it is running good for the long summers, call Lynn.