I tried US for the first time - paid first class tickets for me and the kids. What a big mistake! First of all, when I tried to check-in, I was directed to a kiosk. The check-in agent was very rude and unwilling to help when the machines didn't pull up my reservation. He was not doing anything behind the counter yet unwilling to help a FC customer (at IAH). The plane was an A321, very old and nasty, no in-seat power, no pre-departure drinks, poor service. The plane was delayed for more than an hour because the FA panel/ power didn't work. Perhaps time to replace the outdated equipment? Barely made it to my next flight, on an A319, same story, nasty old plane, poor service. Fortunately my return flights were on AA, and completely different experience from check-in, new planes, attentive FAs etc. Will avoid US unless no other OW airline is available.