I recently saw "Arrival" on demand. I don't know why it got such great reviews because I wasn't that impressed with the movie.
Louise Banks (actress Amy Adams) is an expert linguist brought in when 12 spaceships land on earth. She is tasked with trying to communicate with the aliens. The main event takes place in Montana, where Adams and her team are located. The movie is mostly about Adams and the way she tries to talk to the aliens using signs and symbols of various kinds. There are flashbacks about Louise and her daughter which was quite confusing. Apparently, her daughter had some kind of rare disease that had to do with the aliens, but I couldn't figure it out. Something also happened between her and her husband (divorced, separated), it never really told us.
The film was slow moving, boring and confusing. The aliens (which looked squids) were kind of cool, though. Overall, I'm glad that I didn't spend any money at the theater. Not recommended, although others might feel differently. It just wasn't for me.