The 7 train was graded by its riders, and what was found was that it's overpacked and when there is a problem, no one let's you know what is going on:
Riders give the 7 a C-
In Response to a Rider Survey, More Trains on the 7 Line
Report: Riders give 7 line a grade of C-minus
SUBWAY'S 7 'C'S
But we knew that already, didn't we?
Graphic from NY Post