After re reading, there only two things I would disagree with. A lot of people still believe that shotguns work like magic hallway sweepers. The pattern at 30′, which is longer than many residential hallways, may only be 5 or 6 inches so aiming is still necessary. The other point is about 20 gauges. The variety of ammo, especially exotics, is more limited than 12ga. but the basic variety that you need are available. They are great for smaller stature shooters that can’t get good body positioning with larger shotguns. Lastly, the 20ga. has only about 2/3 of the recoil but still delivers about 3/4 of the power of the 12ga. I hope this gives some food for thought.