I used to be a huge Subway whore. It was 2 blocks away from my old job in Bethesda. Now, there are only two within 10 miles or so of me, and both of them are poor on quality IMO.
It IS good stuff though...of course, don't load up on cheese, mayo, or oil/vinegar.
Bad food will make you fat and kill you, but I think the one thing that
really (literally) kills people is sheer lack of exercise.