The staff person was personable AND honest. As is common, he showed me two air filters. One was had many small leaves but he showed me how it was still ok.
Just FYI, you'll probably get charged over the amount of what the Groupon gives. I was okay with it because my car has a million extra windows & I also upgraded to ceramic for the windshield. Overall, you would probably pay a lower price going directly with the merchant than using the Groupon but I used it anyway. The tint is very fresh so it's still a bit bumpy but the technician said it should go away within a couple days and if it doesn't, then I can come back & they'll fix it for free.