Have regularly flown United to US over past number of years. They are no better, no worse than any other airline. They do seem to have the most competitive fares, Aust to US. Certainly Economy Plus is worth the few extra dollars. As mentioned above the overhead locker space is at a premium, and this is true throughout the USA - get to the head of the que and board as early as possible. Mileage Plus program use to be worthwhile when Miles based but has now changed to Dollars spent.