We have not flown to JFK with T Cook but last year we flew MAN - SFO with them in a 330 - we did not have any complaints.We went cattle class and had reasonable leg room (I am 5' 11'').The outward a/c was really good in that it had a toilet area under the cabin floor (down some steps) which meant there was room for a local 'stroll' around cattle class to ease my old knees
.
The a/c on the return leg had a slightly different cabin layout without the downstairs toilet section but otherwise ok.
Both flights left on time and we were very happy with the food/service etc.