I'd rent it. I saw it in IMAX, so I got the basic gist of the film.
Though, there were a few parts that made me question V's character.
There were a few times when V was talking and I got the impression he was trying to sound intelligent, but he really wasn't...
I can't point out specifics right now. I'd have to watch it again. Other than that, I think this flim makes up for the last two Matrix films that the Wachouski brothers sadly produced.