I wish they had a version of a class like this that was meant to fit more easily into spare time. I'll be taking 18 hours at my own university, and I don't think I'll be able to set aside enough time to put a serious effort into this class.
You should definitely have more than enough time if you are interested in it. I have about 35 hours worth of class including labs in the Fall and I still plan to find time for this course.
