"Me : I opened menu and selected Krug( I have to drink this not because I like it,but because the price)"

Lol! I love your honesty.

Fun TR. I found the service on my NH F flight a few years back to be exceptional. A good balance of attentive but from a distance. Catering is better on JAL F IMHO. In regards to the Champagne debate, I found the 2002 Salon to be out of this world(on older JAL F), while the 2004 not so much. It helps to try a cheap and expensive one side by side- I promise you'll taste the difference!