Okay.. Ill try to clear some smoke.
Without a doubt.. jetBlue is ONE CLASS!!!!
Y162, 32" pitch
Seat width is 18"
jetBlue will most likely NOT honer your certificate, for they are under no such agreement to do so. They are in NO alliance, in any form, and do not plan to do so.
Also, Sabena, you mentioned flying PrivatAir into my hometown airport (Its a love hate bragging kinda thing). While that is great, do realize that jetBlue flies out of New York JFK, not Newark EWR. To get between the two without a car is quite costly..
You would either have to pay a hundred- one hundred and fifty dollars for a taxi, or take the train/shuttle.
For the latter, you would need to take the EWR monorail to Newark Airport Station and board NJ TRANSIT (NOT AMTRAK: $10 more per person!!) fro NY Penn Station. Make sure you get off at New YORK Penn Station, not New JERSEY Penn Station.
Once arrived in Penn Station, find a subway map and figure out which train you need to take to Manhattan. From there, board the jetBlue shuttle bus to JFK T6 ( I believe it is a 5 dollar ride).
Hope that helps... have a great time in the states!