I was upgraded BWI-LAS-OAK, OAK-PHX-BWI as a CO Gold a few weeks ago, no problem. And is it just me, or are HP's FC seats a bit more comfortable than CO's? At least that's what I remember thinking on the PHX-BWI leg (on a A319, IIRC). I know, I know, that doesn't make up for the lack of meal service...