This story is about two lonely married strangers finding different familiar friendship in each other. Their characters are quite oppusite and good, but the plot is not complicated enough. In this case you can just transform “nothing happens” into “it’s too much like life”...
On the other hand rare movies, even independent, deal with global alienation. If u are man of the world, and one day found yourself alone and only in a foreign country, you would like the movie and what it presents to you. On the other hand, if you like more “story” movies, and dislike sad people who do nothing with their lives, this movie might get u pretty bored.