Originally Posted by
unavaca
It's about as guaranteed as it's going to get. There have been various stories of people getting downgraded after having a confirmed upgrade seat, but from my experience reading these forums, it's rare.
I dunno if I'd say that... I'd still be concerned about the possibility of irrops bumping NF/NC->Y. I'm with
denverhockeyguy on this... if it's absolutely necessary to ride in C/F, it's much better to just go and get paid C/F. Is Z even that much more expensive than Y/B on this routing, anyway?