Reliability is the number 1 thing to look for. I prefer revolvers to autos. I also recommend anyone who purchases a gun for home safety to buy a revolver. Maybe a few years down the road, buy a auto. Ammo does corrode after sitting for years. These days, i can bet the quality is even worse. Back when i was really into guns(late 80's), i bought a used Smith and Wesson model 39. Before i had the gun paid off, i had reloaded 500 rounds of ammo, from 88 grain 380 tips to 160 grain round nose meant for 38 special. I reload by the book(my father was a reloading fanatic)and it fed and fired all of these rounds flawlessly. Anything i keep for protection is loaded with factory ammo. When the Glocks first came out, they were big all over the covers of gun magazines. No safety, i didn't like that. Polymer frame, no way. Friend of mine passed and was hired as a Scranton Police officer. He was handed a Smith model 10. He went out and bought a Glock in 9mm. We go back in the woods one day to do some shooting. Having read all the magazine articles on the Glock i knew i could make it misfire. My friend was so proud of this Glock, hi capacity, lightweight, etc.etc. He fired a few clips then handed me the gun. I loaded it, then told him,"watch, i can make this misfire(jam). He said no way. go right ahead. So i shot the gun ,then held the gun loose, a bit sideways, pulled the trigger and it stovepiped. He could not understand why the gun jammed. Holding the gun loose and sideways is something that actually might occur in a police or home invasion situation. The gun is so light, if you hold it loose, it doesn't have the momentum to chamber the next round. So much for the perfect gun. What ever you are going to use, be proficient of it uses before trusting it. I keep a big pipe in the closet left over from installing the closet organizer.