Just watched this on Netflix, and it was kinda alright for a fantasy movie. The set looked nice and the acting was decent. The plot was pretty predictable even if you don't know the 47 ronin story already. The plot where the 'half breed' Keanu Reeves, does everything and anything to rescue the girl so he can then kill himself with the other 'samurai' in a mass suicide, was pretty stupid and kinda ruined what would have been a quite nice good guy wins happy ending.
Anyway, if your bored it's worth a watch, but I would not go out of your way to see it.