We fly United a lot because of Star Alliance miles and I have to say that unless we are in business class, you can expect it to be a pretty mediocre experience. And we usually fly it for the long hauls too. Eeks.
I find the staff rude, the meals inadequate, and the entertainment system only somewhat working.
The lines are long, and if it weren’t for priority check-in we would have to come to the airport a LOT earlier.