Presently booked in C HND->BKK->HKT and back.
Considering using NH miles for a *A upgrade to F if available.
Outbound flight departs HND after midnight, early AM arrival into BKK.
Return is a daytime flight.
What're your opinions on the value in upgrading one or both of the long haul legs? Is it worth it? I assume the C seats are still angled and not lie flat.