Anyone out there have experience with the Extended Vehicle Protection plan that is offered through USAA? I realize it is not actually USAA that provides the coverage. We have the option of purchasing an extended warranty from the dealership. I'd like to get input from anyone who has purchased the EVP through USAA instead - is it easy to use? can you use it anywhere or only certain mechanics/dealerships? any other info about how it has worked for you would be great. thanks!!!