What the class "is" depends on the Master Instructor. I think I am fortunate to be under the guy who is my MI. We hear horror stories and they are beyond our control and fall in the laps of the region coordinators.
The last class I did, there was a much lder guy there with his grandson. I noticed he seemed to be eyeballing me ALOT. I thought, "Man this guy don't like me.", "This guy obviously doesn't agree with a thing I'm saying." I am very interactive with the kids and thought this guy really has it for me!
After my segment, he caught me, shook my hand, thanked me and told me I was very good and did a great job involving the kids.
I wemt home with a real sweetfeeling in me that day.