Yep, tough class. I took ACLS as an EMT-B just for the knowledge base. I had to convince the instructor to let me in first, but she knows me and said OK. I studied the book and know what a normal sinus rhythm looks like. The instructor made me lead the scenario (he's a local medic and knew I was "only" an EMT-B). I passed with flying colors. One thing though, I did notice how shaky some of the "experienced" nurses were in scenarios and discussion. Goes to show you never know.....