I flew AA's version last week, BOS-SEA round trip, one way in first and one in coach.

First was fine. I like the seat-recline lever a bit more than the usual pushbuttons, though they could have used footrests. Neither my headrest nor my companion's would stay up. (This has been mentioned elsewhere before.) The little drink trays that pull out of the center arm rest are better designed than the older ones and hold more. The seats had power outlets for laptop computers.

The AA front cabin has 20 seats (why are the rows numbered 3-7?) so two FAs and one lav don't go as far as they do in 727s and older 737s with fewer first class seats, but it's not a problem. And it does make it easier to get upgrades.

Coach was coach, not (IMHO) much better or worse than most other planes. Considerably more legroom in the exit rows (14 and 15; I don't know if 14 reclines) than the others. (We gave our exit row seats to her kids, who hadn't been with us westbound.) The headrests DO stay up. I didn't check for power outlets.

One nice touch, which may be in all the new Boeing lavs (I haven't flown a 777 yet) is that the sink faucets stay on for a while after you push them. No more holding down the levers with one soapy hand as you rinse the other one, then holding them down with the newly rinsed hand to rinse the other, thus getting it soapy again, then ... Anyone who reads these forums knows the drill well! Is there a Dave Barry story in here somewhere?

Another little thing that makes a difference: the headphone jack is in the front of the armrest at the top where you can see it, not on the side where the tray table hides it. The other controls are up there too.

They still haven't figured out how to design a flight attendant call button that nobody will confuse with a light switch, though. How many engineers work at Boeing? Surely they could solve this problem, for the undying gratitude of FAs everywhere!