First off this is to me an art house type of film. Is it slow YES. Are the scenes sometime long and drawn out with almost no dialogue YOU BET CHA! That’s what makes this movie good, not great tho.
You get to experience the tone of the film first hand. Affleck needs not to say a word and get the pain and sadness he brings.
If you have an hour and twenty minutes to watch this film. Do it and create your own thoughts but don’t overlook this film.