My experience has been that Mustang guys have been the most complimentary of my Challenger. They never fail to pull up next to me and give me a thumbs up or if my widow is down tell me what a great looking ride it is. One guy in a GT pulled up next to me a gunned it, I laughed and told him to get a GT500 and then look me up. He laughed, shook his head "Yes" and told me how great the car looked. His girlfriend also told me how great it looked.
