As far as the "wing chun" choreography goes, I would say they did about as good a job as you could do. For the most part it looks something like wing chun with a lot of movie poetic license as you would expect. I also give them points for keeping wire work to a minimum and resisting the urge to make the wing chun more flashy. Donnie Yen does a great job and I really enjoyed the humble character of his Yip Man. Here is my favorite fight scene from the movie. I think the actor who plays the country bumpkin villain is great and has great intensity.
On the negative side, I have to say I don't really understand the point of taking a real person like Yip Man or Bruce Lee and simply making a fantastic plot around them that has nothing to do with reality. There really isn't any reason to do that other than cash in on their fame. I also get tired of the evil Japanese with their inferior karate that is so prevalent in kungfu movies. I guess the real life history of people who teach kungfu is of little interest to anyone but kungfu nerds. Myself, I would just prefer that they make kungfu movies with fictional characters. I suppose that the easiest way to ruin a movie is to be too close to the subject.