Jesse Plemons is a very underrated actor. He never fails to deliver a good performance. He is not as good as Elizabeth Olsen, but he is good. Elizabeth Olsen is fantastic. Her range is great and she makes this character very believable and sympathetic. Every time she is on screen it's hard to look away. Whatever she does is interesting. Is this the year she wins her well deserved Emmy? This performance could be the difference.
Like every other show from HBO, the visuals are amazing. The sets and the visual effects are spotless. Even if you find the story uninteresting I'm sure you could watch this show just because it's so beautiful to look at.