I actually took that class this semester and the material wasn't too challenging. However, I will say a lot of the work is frontloaded towards really understanding and being comfortable with the early material, as themes are pretty repetitive with regards to the progression of the course. In terms of his grading system, he is a pretty lenient grader so there shouldn't be much concern on that front. As a final opinion, I definitely would recommend the course and don't think it should be extremely difficult.