I flew US 731 PHL-LAS on Sun 11/23 on a new A321, and from what I read that must have been tail #507. The airworthiness certificate above the door was stamped Sep 2008. Man that thing was CLEAN! I like the new overhead reading lights that don't just pop on and off when you hit the button, but instead they dim on and off slowly. They are also a flourescent (or are they LED) of some kind, with a higher color temperature that is more like daylight than a tungsten bulb.
I was in first class. The tray tables are not as deep, but plenty wide. The recline of the seats is minimal. Barely even qualifies for First class, sadly.
Alas, no power ports (which we all knew). No closets (which we all knew). No IFE (which we all knew). The novelty of being a new plane wore off before the door even closed......