Catherine Boyle completed this course, spending 4 hours a week on it and found the course difficulty to be medium.
Very interesting lectures, but the quizzes were literally impossible to complete because they were so vaguely worded. Many native speakers of Russian made similar comments in the discussion forums. This is why I have opted to drop this course - too much time spent trying to fill in "correct" answers, not enough time spent on actually discussing or writing about the book in question. In its current format, unfortunately, I would not recommend this course to anyone.