Yeah, I ran through the Consumer one - and learned a few things, too!
I used IE and the only problem I had was on the 'Q & A' sections where the dialogue box wouldn't close or move, so I could only see the last question. I thought I remembered a feedback link on the other courses I looked at, but not on this one.
It was great to be able to try things as they were explained. The one I played most with was where I grabbed a (non-maximised) window, shook it side to side and all the other windows minimised. I never knew that! :)
I'm hoping to get time to follow the other two Clinics over the weekend.