I did, and it turned out to be a damn circus. We spent four hours at the dealership, I heard the finance manager throw a tantrum and use the F-word about a half dozen times, had them mess up the original loan because they failed to spell out the terms of the loan and we had to secure another loan after we had been in possession of the car after a good 3 weeks (think they broke state law on that one), had another finance manager hang up on me, etc. They ended up giving us a good 300 bucks worth of free car accessories to try to apologize for the ordeal. It wasn't Costco's fault, the dealership I dealt with was really fvcked up and as a result of our experience, they are in trouble with Costco. Two months later, their finance department is STILL fvcking with our car purchase. Just yesterday, we found out that somebody paid off our car loan and we apparently have the title coming in the mail any day now. We've made ONE payment on a 15k auto loan. :Q Somehow, the dealership's finance department must've farked up and returned the money to Capital One (the auto lender that Costco hooks you up with.) That's just a guess, we don't know who it was for sure, yet. Someone from the dealership will probably do an audit and come after us for the money like it was our fault. We intend to pay, we don't expect a free car, but they'd better make it worth my while for them messing up an auto loan that we secured on our own. Grrr.
Overall, I don't fault Costco. The process SHOULD have been a breeze. I'm guessing this dealership lost their tie to Costco.