In thinking about being prepared I tend to think about personal safety and protection at home and at work. In doing so, I have looked at both lethal and non lethal means, seeking to find the greatest level of protection where I felt the most comfortable.
After doing my research this is what I have found concerning non lethal protection.
First, let me say that in my opinion one of the easiest and best non lethal methods of protection is walking or running if need be in the other direction!
Yet if a confrontation is about to take place I like having the option of having a Kimber Pepper Blaster II in my pocket or better yet in my hand.
Obviously this is limited in its ability to be effective because this device is only a two shot deal. However with the element of surprise on your side I view this as a quick: point, shoot, drop and run in the opposite direction method is better than nothing at all.
The 10% OC spray is in a gun shaped device that has a little swing away tab at the trigger point which prevents accidental firing. Howver when you do pull the triggger the blast travels at 90 MPH which translates up to thirteen feet in one tenth of a second. It sells for around $40 so it is cheap protection in my opinion.
The next thing I have looked at which is ten times the price of the Kimber Pepper Blaster II and I consider much more extreme but probably twice as effective which is the consumer version Taser C2: http://www.taser.com/.
I think each person has to really evaluate what they are going to be willing to carry on a daily basis and or what they are willing to use.
Regardless of what you have, if 100% of the time it sits on the closest shelf or stuffed in a drawer somewhere and not on your person it is not going to help you much when a time of crisis comes.
The best personal protection is a plan! Making sure you are safe is an "active process" that requires you to keep your eyes open and be aware of your surroundings at all times. If a crisis arises know what you response will be before it happens!