I am not sure about the layout of the 102 seats but I flew last Wednesday (second flight) on the STN - IAD route with my wife and 4 children. It was excellent in all respects!

One thing I did note was that the comments regarding the bathrooms on the JFK aircraft had been taken on board and these had been fully refitted.

I am looking forward to the flight back tomorrow. 6 seats for the price of 1 in J Class! Fantastic.