My two cents...

I cannot sleep in an economy seat, and so the most important part of the F/J product is the opportunity to sleep, and so to make the most of the following day. If you are going to India for six months then perhaps that is not important, but if you have a seven-day vacation then losing nearly 15 per cent of that to catching up on sleep on the day after arrival is a serious matter, and so getting that day back is worth some serious money.

Next comes the fine dining experience, and here Air France wins hands down. I was once upgraded between Paris and Beijing, and the food service was as good as an upscale Paris restaurant. Other airlines were relatively disappointing: I have used British Airways (Club, as they call their business class product) a fair amount recently, and the catering was 'fine' but forgettable.

Alcohol is of course abundant in the premium cabins, but should be treated with caution since it can make you feel a good deal more ill in the environment of an aeroplane than on the ground. And since you lose much of your ability to taste subtle flavours when airborne, it is a criminal waste of good wine to consume it during the flight. So for me the main aspect of the drinks service is the provision of enough champagne to make me sleepy and so refresh me for the day after arrival (champagne generally does not give one a hangover).

Since all these benefits are offered in J, I don't really see the point of F.