They're splendid. I ride them daily as the trains I take a all new ones except for the cab cars. They're very comfortable, well lit, not crammed, and the air conditioning is incredible. The only thing I would change is making the seat backs reclined back another inch or so. They seem just a little bit "too vertical" but nothing to complain about. We sat in the sun when it was 100 degrees for nearly 6 hours the day we hit a CSX dump truck at a grade crossing in Silver Spring last July. Even with the doors constantly being opened and closed by fire and police officers, the temperature never dropped. There was a cold wind the whole time. It actually started getting chilly after 5 hours.
Now if we can just get the new cab cars and dispose of those cattle cars.