I love this movie! Those three guys are not only great at martial arts but funny and charming actors as well. All the kids loved it when it came out and still quote lines from this 'classic.' Yes, there are borrowed ideas (Teenage Mutant Ninja Turtles to Home Alone...) but who doesn't? And stunt doubles for the Grandfather, but who do you think he is, Jackie Chan? Victor Wong makes a sincere grandfather/mentor. Hey, the adult reviewers may not have enjoyed or even understood this movie, but the 'kids' that I know, did. As for the Ninjas themselves, they acted naturally and credibly. A perfect family movie.