I had, on the whole, a just positive experience booking a One World Visit Asia pass recently, booked in conjunction with a BA redemption to China. It wasn't without its mysteries though.
Very mixed experience on the respective booking lines to BA and CX. BA seemed on the whole a lot less experienced with the product and had to transfer and hold multiple times. CX did it quickly with a call back within an hour ready to purchase.
Though I've got the flights confirmed and complete, still wondering how much the fare brackets actually are. From process of elimination a zone three would be GDP 125 for HKG to Shanghai, zone four seems to be about GDP 150 for Manila to Tokyo. For a One World regular, probably just about worth 2-3 hours on the phone for two sets of two flights to explain it all.
I wrote more on the experience on my own blog:
https://miketaylstravels.wordpress.c...iguing-delays/