This is a very well-written show with excellently-developed characters. None of the characters are shown to be particularly good or particularly bad - but as human beings, which is something I greatly appreciate as a writer. The realistic themes covered here will definitely get the viewer to think long and hard about our societal framework and how that can either help or hinder our way to happiness.
Another thing I like is the acting of the main four. Though all of them are subtle with their emotions, they still form distinct personalities which make for great performances overall. Understated acting is perhaps one of the hardest types of acting to accomplish, so I believe the lead actors did a superb job with their characters, being neither overdramatic nor wooden.
I would recommend this to anyone who enjoys rich character development and unpredictable, yet realistic outcomes. The best part of this show is how incredibly human the characters are, which is something I believe needs to be shown more in movies and TV.