I’ll summarize what you might expect in the posts that follow. One segment will insist that Asian carriers are clearly superior to AA F period (expect to see some “hands down” phraseology). A subset will go as far as to prefer Asian carriers J to AA F. The other group will say that the AA F seat is indeed spacious and comfortable, but that service and amenities are lacking. A sub set will say that service and amenities in AA F are fine.
None will discuss price paid. Some will tell you to fly via HGK or some such place so that you can fly an even better Asian carrier than JAL.