I was charged 50 dollars for a cabin air filter. I recommend buying one from your local auto parts store (cost is about $20) and replacing it yourself. It's very easy. Also, they are always pushing for a fluid change (ie. radiator, transmission, brake) when the manual doesn't call for it. I told the gentleman the manual doesn't call for these and his reply was ""You shouldn't go by the manual.""
Cons: $50 air filter, always pushing for an un-needed fluid change