Caught this with the wife yesterday. Incredibly fun movie, and worth watching on IMAX. Vin Diesel seemed to be channelling his inner Stallone for a good part of it (slurring words, massive fistfights) and it offered closure to a number of characters from 2 Fast 2 Furious and Tokyo Drift, but still left the door wide open for a sequel.
I am, however. I absolutely love the Mafia genre (books, movies, etc.), and yet have only seen Scarface of those four (and don't own it). Well, I do now. :)