Originally Posted by
Daner
We aren't fancy or flush enough to meaningfully appreciate an upgrade from J to F as much as we would appreciate using the points saved on an additional trip. To illustrate this, when we boarded our CPH - SFO flight last year my wife got all the way back to Y before even bothering to look at her seat assignment, so she was pleasantly surprised that I had Plusgraded us to W. Having grown up with Jante whispering in her ear, she still has trouble using FastTrack, lounges, or pre-boarding without a twinge of guilt. She has yet to enjoy a lie-flat bed on a really long flight, but now that she has enjoyed W to and from the West Coast I think that I may be able to get her to accept J under the right circumstances without too much protest, especially if we are headed to AKL. (She has done that before in Y.)
When visiting family and friends in SoCal the convenience of direct flights between ARN and LAX is compelling enough to keep us on SK, especially now that the hard product has been updated. We could get to the Bay Area directly using DY to OAK, but I know too many who have been stranded on the West Coast due to mechanicals with no access to *A partners as a backup.
I think, if you have enough points to enjoy first class, especially on such longhaul destination as NZ, it is better to redeem for F, rather than J and save some points.
Using Amex -2-4-1 you have many options of enjoing really great experience.
To name a few, Lufthansa/ASIANA first to Seoul, Seoul to Bangkok. Bangkok to NZ (not sure anything flies to NZ from Korea)
ANA from London or FRA to Tokyo and further to Singapore or Bangkok and further to NZ.
Business class is definitely better than economy, but first is another universe

I would try to maximize and have potentially 4 first class legs (Europe to Central Asia to South Asia)