If you are unfamiliar with the layout and format of an online Gotham class, they have an online tour here. Gotham has both online and brick-and-mortar classes in their physical location in NYC.
This class is set up to help aspiring writers in the field of speculative fiction hone their craft. In that respect, it focuses more on craft than it does the speculative fiction. I've heard that "general" creative writing classes tend to be geared towards literary fiction and can be unfriendly towards genre writers, so it is good that there is a place where we are welcome. Selections from spec-fic writing were used as examples, and the students are expected to be working on spec-fic projects, but the main focus of the class is making the students better writers first and foremost. I don't think that this is a problem, I certainly benefited from it, but I was expecting to have more of an emphasis on the spec-fic aspect of writing.
Our instructor was a professional in the field, Paul Witcover. He provided a wealth of insight in his instruction and discussion, and feedback on the pieces we submitted (more on that later).