Hmmm, my travelis complicated with 2 C award trips for the kids and me in Paid C (yikes), onhe of the award seats is at 50% of miles with THAI AMEX deal (ex-BKK only). Kids have no status, and we have little flex with dates, so waitlisting wasn't an option - I moved by a few days to secure the seats. High season too....
GUP goes into P/J class, which is better (?) than the class for award tix and upgrades awards I guess.