Soon I'm flying CW LHR-LAS and F back from LAX, (GUF) and I genuinely regret paying an extra £300 for first. I value a bed highly, everything else in CW is quite adequate (first world terms not vs other airlines) and I'd rather not try anything more fancy (its bad enough getting used to turning left, Y seems so much worse now).
I would certainly appreciate the better lounges in F over CW thought if I wasn't Gold, Qantas First in LAX and sit down dining, great, and Cathay F lounge in LHR