T7 is a great premium facility in my opinion. The premium security channel virtually never has more than 0-4 people ahead of you, the refurbished F lounge is acceptable and the Fast Track boarding works. There is also a shortcut from the security channel to the lounge pavilion behind the newsstand and through the Duty Free via a virtually deserted hallway. It's like going through a small town airport even though you're in the middle of JFK.
Coming back in, it rarely more than 20 minutes from the door opening until I am in a taxi. ^