Thanks Boh1 -- seems hardly worth it since I retire 120-150 eupgrade credits every year although this year I could probably have used them for the PLANNED international trips. For people like me who have lumpy international vs domestic travel, could be valuable but if only 50 eupgrade credits, hardly seems worth the effort since even on cheaper Prem Econo fares you can burn a fair number. Oh well, let's see how it rolls out across different cards.