overall, The Final is a relatively loose adaptation of the source material. While it has the same antagonist, themes, and basic story structure, it is largely its own story—which is probably for the best. In the original Rurouni Kenshin manga, this arc took 10 full volumes to cover. (The previous arc, which got two films dedicated to it, took 11.) Trying to cram all this into a single film would have been a fool's errand
Visually, the film is wonderful. The fights are masterpieces of choreographed combat with little-to-no CG to be found. The wire-fu is used in just the right amount to make our heroes and villains seem superhuman but not cartoonish. If you enjoy practical effects, you're going to love the care and attention that went into them in this film.