Art: To say that Redline is very well drawn would be an understatement. The art is definitely something to behold. The shading is superbly done and the colors are vivid.
Animation: The animation is very fluid. And there is plenty of it. It's awesome to watch, especially with the detailed art. I like to watch it frame-by-frame to get a taste of all that awesomeness.
Choreography: Well, I expected it to be completely over the top and unrealistic but it's not actually that bad. The fight in the restaurant wasn't too bad. The ending really pissed me off though. They BLEW UP the car, and then continued running the race ON FOOT? Fucking dumb. The car must have been travelling at 10 times the maximum speed of a human. Their legs should have been broken just from the impact. Oh and also I hate racing movies.
Conclusion: Great art and animation but let down by the fact that it was a racing movie and not about fighting and killing stuff.