Is the 1989 movie "Batman" starring Michael Keaton any good?

Is the 1989 movie "Batman" starring Michael Keaton any good?What was the plot of the movie? Who all co-stars in the movie? Did it win any awards? Did the movie help Michael Keaton's career or any of his co-stars? Is it worth buying on DVD? Is there any nudity,swearing or violence in the movie? why was it rated PG-13 for?