? I've never understood the mindset of anyone who says "I'm flying to X" (usually LHR/LGW/FRA/NRT or somewhere similar) "will I be able to go straight to the gate for my return flight or will I have to clear customs?" What on earth is the point of flying for hours, just to turn around and fly back again?
The problem is that a MR is a pure Mileage Machine for the lowest possible price. Itīs not that nobody would love to see London or Rome but try to spend a night there under 250-300$ plus the transfers and sightseeing. If you make it in 1 Day after your jetlag you are good.
However the "sightseeing extra" cost you more than you paid for the whole ticket !
Most of the time a MR is for status qualification, so once you have your status use the miles to get back to this place on a C-Class award ticket and travel in style and with time instead of pressing valuable things in a tight MR itinerary.