Just download the maccas app.... and they are giving away free big macs today.
I haven't had one for donkeys years, but the free one I got today was pretty good.... nice and fresh.
The problem I have with maccas/BK/KFC is that their quality is inconsistent. It is luck of the draw whether you get a really freshly cooked meal, or one they have thrown in the microwave to heat it up (looking at you BK and your soggy microwaved buns!!).
Thats why I like In'n'Out burger, bit far to go though.