I went from a 2005 Pontiac GTO to a 2005 CPO Cadillac Escalade. I went from having the most premium car available from a totally shit brand to having a premium car from a premium brand. The dealership experience was night and day. When I pulled in to the Cadillac dealership the service manager knew my name, had my upcoming service requirements in-hand, and if I wanted a rental had it ready to go in the lot for me to take the keys and drive off. The Pontiac morons couldn't even spot that my car was a GTO.