I recently purchased a car that had been unoperational for over a year. The a/c was functioning but no cold air. Over the phone David explained to me what needed to be done and why. Appointment was made and vehicle was brought in after the diagnostic was made, I was informed that my system was in perfect working order just needed to be vacuumed and charged. When I settled my bill I was informed as to the temp at the vent and that a dye was added to the system in case there should be a failure or leak making it easier to pinpoint the cause. Also the warranty was explained, based on their professionalism and honesty I will be a repeat customer. THANKS GUYS