Susan is one of my favorite chess commentators because she is able to describe ideas on the board in a way that players of all levels can understand. I think this allows a wider audience to be engaged by not talking over anyone's head, while still describing very complex ideas on the board. I think her analysis has been spot-on and she anticipates a variety of moves and strategies. I especially like that she is not dependent on the "computer suggestions" and shares her own thoughts freely. During the World Championships, many members of my Philadelphia Chess Club commented that they preferred Susan's commentary. I would switch channels when she was not the host.
Susan Polgar (born April 19, 1969, as Polgár Zsuzsanna and often known as Zsuzsa Polgár) is a Hungarian-born American chess Grandmaster, coach, author, blogger, and commentator. She is famous for having been a child prodigy at chess, for being a pioneer for women in chess, and for being an advocate for chess in education. She is an Olympic and World chess champion, a chess teacher, coach, writer and promoter and the head of the Susan Polgar Institute for Chess Excellence (SPICE) at Webster University as well as the head coach for the 2011 and 2012 National Championship college chess teams at Texas Tech University and the 2013, 2014 and 2015 National Championship teams at Webster University. She is the oldest of the famous "Polgár sisters": Zsuzsa, Zsófia, and Judit. She was the first female to earn the grandmaster title through tournament play. More: en.wikipedia.org.
Susan is concentrated only on herself and is prepared only for top players and students of her university. At World Cup in Tromso she was not prepared for the youngest players in the tournament. Especially she did not know anything about Wei Yi. Probably she is good for US, but for the rest of the world she is not a good commentator.
I agree with Mel. My club in Kansas also followed all the Carlsen - Anand games when she was on and tuned out when she was not. I don't like commentators who talked way above the understanding of chess amateurs.