Definitely check out the movie.
It's a pile of steaming coil.
Either Woodstein made up elements of the book, or the screenwriter did.
In one scene, they use a potted plant in an apartment within visual distance of Woodward's apartment as a signal to meet.
Can you imagine how difficult a signal that is to set? The apartment was not on ground level, which meant you somehow had to get the tenant to move the plant for you, then move it back again.
I think there is several instances of this sort of embellishment.
The book was much better than the movie. A must read is Len Colodny's Silent Coup. G. Gordon Liddy calls it as close as you'll get to the truth of Watergate.