I was super nervous about using these guys due to the poor reviews, but I have a home warranty and the company chooses who we work with- I didn't have a choice. I was pleasantly surprised. We actually had to cancel our first appointment because we were having some major electrical work done that morning and the power was shut off at the time the appointment was supposed to be. THEY actually called us a little later in the afternoon to find out how things were going and asked when they could send someone out. They came out on time and got right to work. The technician was nice and knowledgeable and explained to me that our A/C was shot (bad compressor and burned out wires- we were worried this might be the case after he said it was almost 20 years old). I was glad to hear he knew about the warranty process and explained how that would all work too.
So far, so good. I'll be sure to update my review when they actually repair or replace the A/C (it's pending approval from the warranty company at the moment).
UPDATE: The A/C was installed the same day the warranty company said it came in. I have nothing to complain about- they did a fast, good job. The new unit works great and now we can get our floors done (it was too humid without an A/C to have our wood floors stained).