Guns are tools that deserve the same respect and careful handling as many other tools; that's why when you are looking to learn how to use them in certain situations, you need the best possible instructor. A bad instructor will just teach you how to shoot and that training can be fun and you will learn, but it won't teach you how to protect your house or your loved ones. Remember that we don't rise to the level of our expectations, we fall to the level of our training.