Just my opinion. If I was going to take a FOF course, I would want to do 2 full days of FOF. Getting hit once or many times with plastic bb's is much better than the real thing. Yes, it will hurt but might make a person want to learn from mistakes made and do better. Getting hurt does not scare me. Getting dead in a real situation is bothersome to think about. Don't know if I can or will be able to take a class, but I think it would be a learning experience as well as being fun. Especially if it were me making most of the good hits and not the other way around.