Liked it.
Not a movie that I would necessarily watch again, though. I have probably watched parts of Inglorious Basterds 10 times in the last 2 months, because it is currently on HBO/Showtime. Haven't been tempted to click on 3 Billboards at all.
I liked it but I can see how those who didn't really wouldn't. Its not a movie for mass audiences. Its hard to describe exactly. A much darker version of Fargo. Well cast with a lot of great performances.
It also exactly the kind of movie the academy loves.