Carrying a backup is not feasible for me, I'm a professional and even when I'm not working I like to look sharp, so i will not and/or cannot dress around my weapon. That's why I like my little LCP so much. .380 is no powerhouse, but I practice regularly and can put all 7 on a small paper plate at 7 yards in a hurry. And most importantly I have the little thing tucked on me almost 24/7 because the whole package, loaded and chambered LCP + holster is only 13.3 ounces - by comparison my iPhone 4 with a Magpul case is 5.7 ounces and my Benchmade Mini-Grip EDC is 3.3 ounces.
Friend got a kitchen scale yesterday lol.