There are quite a few differentiating views on the product that is Pro Football Focus.
On one hand, it’s a great analytics tool from a statistical standpoint, it helps with some film study work, and snap counts and alignment. But on the other hand, the grading system and the rankings just don’t make a lick of sense more often than not.
With the grading system, the common criticism is that you can’t put a grade on someone, especially defensively, if you don’t know what their assignment was on a given play. Players have said it, coaches say it and more and more media members are buying into that, too.