I just signed up for this myself.. so no warranties on how good it is... other than it's free. There are more courses offered for $$$... but I can't determine if they are worth it.
I tend to be skeptical about big institutions offering classes... because I always wonder who sponsored the building and therefore controls the curriculum. So for me, I prefer to spend money with experts who live this every day. I doubt OSU is going to hire and promote Joel Salatin, haha! So instead, I'll buy his books,