I finished the course this weekend with 5 of my friends, and I have to say it was one of the best things I ever did. I learned a TON, and feel much more confident carrying now - not because Mas told me what I wanted to hear, but now I know how things really work and what I need to do myself.
Two big points I want to mention that I learned:
1) It is your DUTY to your loved ones to make it home at night. Getting killed is like having all of your loved ones die. It is not fair to you, or them.
2) A firearm is a rescue tool, like a fire extinguisher or a first aid kit. It allows you to handle a situation until the professionals arrive. Those are terms that non-believers may be able to understand. The average self-defense shooting takes place from realizing something is wrong, to shooting in 1-3 seconds, a police response will usually take AT LEAST 1-3 minutes. Until they show up, you are on your own.
Also inlcuded was a ton of tactical and legal advise, which I shouldnt discuss. If you've ever thought about taking this class, it is worth its weight in gold.