I chose this rating because the content is great. Although it's for a class (and we're not going to finish all of it), it has some great literature if you're into the subject matter.
The only thing I didn't like about it is that it's hard to read. However, that comes with the territory. I would recommend that something like this would come with a companion text or some sort of dumb down some of its literature. It takes a person who studies these types of texts to divulge into its arguments.