Inside Llewellyn Davis , movie about a folk singer with a cat?

So I saw an ad about a folk singer who travels with a cat, a movie called Inside Llewyn Davis. It apparently has John Goodman in it, and from the trailer looks intriguing!! I want to see it. Has anyone else heard of it or maybe even seen it?

Here is the trailer!

One of my best friends saw it two days ago. He said he liked it but didnt elaborate.He's very into indie movies.