I'm rating BP a 4/5 not because of the cost of their burger. While I'm a huge fan, I wish their burgers were $2 less. Then I would eat there more than once a week.
Nothing compares to BP. Their burgers just melt in your mouth. They are cooked JUST right, which most burger joints in the city tend to screw up, by overcooking their burgers.
I always get the double cheeseburger and hey, I can get used to the grease. The taste overcomes any mess than comes with the burger.