I am new to Phoenix and had no experience with any other AC companies in the area prior to December 2012 when Cool Blew came out.
About a month prior to Cool Blew coming out to our house I had another company come out to "inspect" the AC unit for a measly $20 and four cans of food as part of an off-season promotion they were running. The other company told me we had a major leak in the coil and if I didn't replace the unit before the next cooling season began, the whole thing would freeze up and we would be stuck replacing it as an emergency.
Enter Cool Blew. They were the company our home warranty company sent out to repair the freon leak claimed by the previous company. The Cool Blew guy showed me that the previous tech that was out had left the freon valve caps laying on the ground next to the outdoor unit, allowing the elements to clog it up. Cool Blew replaced a Schrader valve and recharged the freon (it was about 15% low). The work was done in the winter so we haven't stressed tested the unit yet, but Cool Blew earned high marks with me for professionalism, candor and saving us money.