Not too easy. Not too difficult.
It's a great into to combinatorics. You get to learn a lot.
Dr Sellers lectures are absolutely great. He is 50% a professor and 50% a comedian. He makes a great effort to make sure you understand the concept and makes sure everyone is catching up. There are no homeworks. There are weekly quizzes, if you keep up with them. You're guaranteed an A.
Hours per week:
Advice for students:
Definitely don't miss lectures. It's easy to understand when some one is explaining you these concepts vs trying to learn them on your own.