Thank you. I did look at that but all the info I have about any kind of "class" is on the BP, which says M. However, that might be the "class of service" designation and not the "booking class" (why they are different makes no sense to me). I have the E-receipt and it does not explicitly show the booking class anywhere. Regardless, I would like to know the booking class before purchasing and I seldom see it displayed online. What is the trick to find out what it is BEFORE purchase?