Subway is only acceptable if it is an incredibly busy location, and you have a deal. On top of that, it helps if you know the arabic word for "MORE", so you can yell at the sandwich slave enough to get an appropriate amount of toppings. As such, I almost never go there. It's so fucking infuriating when you ask for the red unions and and they grab like two practically shaved strands and stretch it across the whole sandwich like that's what you wanted.
I don't really like subway, but very rarely I will go to one in like an airport.