What is it about Jane Austen?

What is it about Jane Austen's books that people rave about? Perhaps I am lacking the needed intent but I tried reading Pride and Prejudice and found the language difficult to follow and the story was moving really slowly at least in the book. Can anyone suggest the most simple book by her that will not make a layperson feel like they're in over their heads?

I know that feeling. Price and Prejudice is really a slow moving book. Because in my opinion it deal with education, manners, marriage and morality from the English society. All of these issues are still current but are seen under a different ligh now maybe. But to really understand the book is not that hard.

But I've never heard anyone talk shit about her books like they do about, say, Twilight ... poor example I guess, but you know what I mean. Whoever I come across, if they've read her books, they have loved them. No one yet to say oh man, I couldn't finish that book. Certainly boggled me cuz I couldn't finish it ... I agree that it's probably not my type.

The book's language is of 18th century which might not adjust with many and also its very slow which I agree to an extent as I have read the book.
I know this might sound weird I would suggest you to the movie based on this film starring Keira Knightley.
You would get an idea