Im Plat and my wife is gold, leisure travel we are almost always on the same itinerary so she gets my benefits. Last week due to some changes we were on the same flights but different records. When I checked her in at the 24 hour mark, I could select MCE for her-but on the first flight only. I had to wait until 24 hours before connecting flight to select MCE on that one. System let me-without charge-but I was surprised it didn't let me do all the flights at once.