It just came out in Korea this month, so I saw it last night and I loved it!
The music is absolutely amazing, I learned SO MUCH about linguistics (but really, I had so many questions afterwards) and I think it was a really refreshing take on a 'first contact' alien movie!
If you HAVE seen it, I highly suggest checking out this really awesome look into the film. This guy is great at understanding details that you wouldn't even know existed. MAJOR SPOILERS.