I'm baffled as to all the good press this has been receiving. I found it painfully ham-fisted, filled with groan-inducing 'symbolism' and over-the-top hand-holding for the audience. The race scenes, although shot nicely and containing some incredible sound design, weren't particularly exciting either. Most of the races didn't run on long enough to thrill and the finale blows its load, ending with a whimper. The whole thing is just a cheesy TV style drama (albeit a nicely shot one) with no subtlety or respect to its audience.
This was just kind of 'meh' all round. It wasn't bad, just kind of average throughout. Some of the set pieces were fun and the idea of taking Wolverine's invincibility away was a nice touch. I loved the setting too (any excuse to get ninjas involved), but it wasn't the flat out ninja/samurai action extravaganza I really wanted.