The Teaching Company has a large variety of courses, many of which are very, very good. I have to isolate this one as being among my all-time favorites, and definitely in my current top ten, maybe top five. Markos is one of those rare lecturers that seems to be able to rattle off information, at whim, and he does so energetically, enthusiastically, and, above all, coherently. Probably the only thing that I dislike about lecture formats is that you can have professors who speak so slowly, pausing at every opportunity, and, by the end, you feel like you didn't come away with much. Markos is not like that, at all. In fact, I think he pushes the envelope, finding precisely the right amount of information to convey in a lecture, while achieving clarity and providing substantial content; and it is hard to imagine someone presenting more information than he does, in the time given, without bombarding the viewer or listener, inundating them.
As far as the course content, my interests have only recently moved toward an interest in aesthetics, and poetry is one of the areas of aesthetics where I am hurting for knowledge: my background was nil. (I am trained in the sciences.) What helped me in the getting so much out of this series was that Markos is a "big picture" kind of guy, which means he appreciates the philosophical underpinnings of any given subject --and the basis for any intellectual discipline is philosophy. He thoroughly employed philosophy and history to build a picture of what the poets had in mind, as they developed their modes of poetry, and this especially made much more sense of later literary thought. Between the biographies, the philosophies, and the styles/literary theory, I found this lecture series to be wildly productive and informative. I can't imagine this series getting any negative criticism, because of just how insightful and thoroughgoing it is.
There is not a person interested in literary theory that I would not recommend this to.