PS - I substitute white cheddar cheese and substitute grilled
  onions. No extra charge. also, I usually get two as well, if I'm
  not taking advantage _again_ of the receipt "buy one get one
  quarter pounder" special. We must've filled out that same survey
  dozens and dozens of times. Good deal]. Funny thing: I don't
  care for McDonalds generally. But it's so damn cheap, it's hard
  to avoid. Cheap protein. Fatty salty protein but cheap protein.