I've been binge-watching and I'd put this as one of the top 5 eps of the show because of how it handles some real life hard issues. Actor Carl Lumbly gives an award winning performance (I love when he winks at his son about Zoon). I guess even martians have weaknesses.
The interactions between supergirl and mon el are less real except for capturing problems with relationships. Lena and Sam are somewhat akin of dealing with parent-child reversal relationships.