Worked great. We got reimbursed for our parking expense for our first day at the parks. Upgraded our 5-day p/h passes to a FL seasonal and a FL annual pass. Only cost $78.81 to upgrade - a no brainer in my opinion, plus the reimbursement for parking. We upgraded at the Guest Relations office at Animal Kingdom. At first, the cast member quoted an incorrect upgrade price of $179.00 (glad we knew how much we should have to pay). A manager came to our rescue and we got the upgrade at what I had figured.
One note: If you pay for parking with a credit card, your credit card will be credited back. If you pay cash, you will be given cash back. According to the cast member and manager, however you pay for parking you will be reimbursed as such. And this has to be done separately from the upgrade price. You cannot apply the parking reimbursement to your upgrade cost.