The burger is nearly always great, but occasionally it tastes strange. You are not allowed to see the ingredients and the staff suggest you might be able to improve the situation by re-wrapping and re-unwrapping the burger. This does nothing. The senior staff suggest leaving the burger in the fridge overnight and trying again in the morning. This does nothing. None of the staff actually know how to make a burger, but they will swap your strange burger for a refurbished burger for only $18.