OK, for the starter, let me say an entertaining movie from me always get a 7, a good enjoyable movie a 8 and so on. If i go from 6 and down, its because the movie really suck or that i want to turn it off cause I'm bored.
Personally i was thinking trough the whole movie what was its real identity and thats where it probably fail for a lot of people when personally i still can enjoy it. Thing is, you start looking at this movie like an epic story, then it become way more of a vengeance "train me master please so i can kick the bad guy ass" to try to go back to the epic trail.
Problem is, its neither of them. The fighting is not enough present, not carrying the movie if i can say, its more like there is a couple scene here and there. Then as for the story, its a little bit cliché like some said, it lack the polishing feel of a movie like Red Cliff for example.
But then at the same time, i didn't watch the clock, i was interested in following the story enough to stay in front of the TV, so i was ENTERTAINED, which is as far as many movies will go. Rarely a "Dark Knight" will pop and make you watch it every day during 2 weeks without getting bored.
I must had that I'm not a fan of hidden dragon crouching tiger, I'm not a fan of Chinese martial arts movie where the characters are obviously wired and fly over the screen. Here there is a few supernatural scene, but nothing that can be annoying. Like Dragon Tiger Gate, it pass with the rest of the movie without making you think "its so stupid" So yeah basically don't watch it as a pop corn beer time kung fu movie, don't watch it as an epic masterpiece, but just watch it as a cool little movie and thats it. I would recommend it to teen as well so you could see it with your family.