Originally Posted by
rxgeek
I never try to use my GUCs. It's just too complicated. The fact that the experts here have to clarify what is said bears me out. This process begs for a flow chart.
I don't find that it's too complicated, so if I ever find upgrade space on a longer flight, of course I try to use my GGUs so long as the applicable fare hasn't gone sky high. But it's easier to find a unicorn than upgrade space, so most my GGUs go unused, too.