I used to make that roundtrip at least once every three weeks and the kaiseki meal was definitely the highlight. Sometimes, I was the only pax in F to order it... but it is truly outstanding!!
It seems to take a fair amount of inflight preparation... on one flight when several other F pax chose it, I noticed that it took quite a bit of time for the service to commence. Unlike Christep, I never noticed any probs with the presentation.