I knew absolutely 0 about carpet cleaning, and passed the test pretty easily (missed the generations of carpet....still don't know them). All you have to do is listen in the class a little bit. Good Luck!
My honest opinion.... Its worth attending and taking the test, pay attention in class and study your book and you will pass, even veteran carpet cleaners should take the course and the test, you may not know as much as you think you do. I am always wanting to keep myself updated on my profession, any class and training is always a plus.
depends how much drinking you do with good friends that you dont get to see all the time. I used to goto steve polisis school up in nc, the one next to the strip joint. Those where long night classes. Sure do miss those days