I've done the RTW in One World in F the last two years and have been very satisfied especially with both Cathay Pacific and British Airways being members. As you know, those two airlines are arguably some of the best first class in the world, especially on Cathay. Only complaint about One World I have is that their RTW desk is not open 24 hours so it can be difficult to make changes when your on the other side of the world. Besides from that, great ticket and excellent value.