Waste of time
The only recognizably real human interactions occur in the first five minutes and last minute of the film. Other than that, you must be a real sci-fi aficionado to be interested in the unraveling of the alien's language or the meaning of the main character's ability to foresee the future and how it all fits into the plot.
Also, I must say that the movie takes a very dim view of human psychology in showing how it thinks we would react to such an "arrival." Perhaps the writers themselves listen too much to right-wing hate media.