I should have called them FIRST!
I called another company twice to fix my AC unit. Each time, they said that my freon was low, most likely due to a leak. Instead of actually fixing the leak, they charged me two separate times to add more freon, and said that they'd need to charge $1200 to replace the entire unit. This sounded fishy to me, so after another month of non-cooling, I finally called RS Andrews.
The appointment was extremely easy to set up, and the service technician solved the problem within 30 minutes!!!! He pulled out an air filter from my attic that was disgusting. It looked to be 3 years old, and immediately my roommates and I heard & felt cold airflow in the hallway. Then he tested the freon level in my condensor and said that there was 4 lbs too much pressure in there, and had to take out freon! I'm going to call the other place to get my money back.