How do you make money if you only charge $40 for a tune up? Tell the customer they need to service their A/C for $300 of course. I wouldn't use these guys again. They didn't provide enough information to persuade us that we really needed refrigerant. Didn't directly answer my questions about it. And, didn't measure the temperature coming out of the vents which Orangutan did. I would go to them with my future needs. Also, before you agree to any service or repairs do your research!