Scared to watch the movie

I have heard some really good things but also some very bad things about the movie The League of Extraordinary Gentlemen. When I told my friends that I was reading this graphic novel, just about all of them said that they have not read the graphic novel but they have seen the movie and rated it very high, so I thought it would be pretty cool to see it after we were done reading it, plus I thought that a book like this would make an excellent movie. However the second day into the book, our discussion somehow lead into the movie version of The League of Extraordinary Gentlemen and some of the things that our professor said really discouraged me from wanting to watch the movie. So what I'm asking now, it  worth to go and see it? Now I know it won't be a Lord of the Rings(obviously the best trilogy out there) but I don't want it to be so bad that I wish I never have watched it *cough* Avatar *cough* Eragon *cough* *cought*. But I heard a couple of other people in our class talk about this so I'm wondering what you all think?