Back in 2000, my "late 20s" daughter and I flew SYD-SFO with them. I posted on this board at the time, after my daughter was taken ill on the flight.
Initially, the CC attitude was "it will go away" but, after the problem became serious (breathing problem due to a lung infection), they were fantastic.
Through PPRuNe, I "wrote up" the CC, and the doctor and his wife who were seated in front of us (hopefully who got a couple of upgrades)
I hear a lot of "slagging" of UA crews, but when the "carp hits the fan", I can't say enough about them.
(no "partisan" interest, my daughter was with US-Air at the time!)