Everything here is a read of your work. None of it writes your pages.
Notes on the line. Not a report at the end. A note in the margin, next to the line it is about, while you are still in the scene.
Remembers the whole script. Penn keeps a bible of your characters, promises and threads. A note on page 80 knows what you set up on page 4.
Argues back. Disagree with a note and say so. Penn holds its ground when it is right and concedes when you are. A conversation, not a verdict.
Full coverage when it is ready. A complete read with structure, character, dialogue and a prioritized rewrite plan. In minutes, on every draft.
A craft library. Analyses of 91 produced screenplays. When a note says a scene is a memo, it can show you how a produced script solved the same problem.
Hear it read. A table read of your pages, performed aloud. The fastest way to find the line that does not sound like a person.