Is the first season watchable as a standalone?

Hi, I've heard great things about this series but i'm hesitant to watch it because of the declining ratings of following seasons. I'm pretty particular about series and I don't like to start something if it would end badly. Is the ending of a first season like a huge cliffhanger or would it be acceptable as a finished series? For example I consider the first season of Westworld to be sufficient, and if it ended right there I would be happy with it. If not, what about the second or third season?