bd,
I think I'm going to get one of these in the next few weeks so I'll post a range report or something when I've had a chance to try it out.
I agree with that keeping it attached to your body is a good idea. From what I've read about the SafePacker, you can attach this thing right to your belt on your pants if you want to wear it like a regular holster, or to a backpack or backpack belt or with a shoulder strap, etc. It seemed to me like this thing could be attached just about anywhere you wanted it. Unless I have a small daypack on, I couldn't see wearing your gun in a holster under a larger backpack's waistbelt. Not only would it dig into your side, but I don't know how fast you could access it. I guess I'm thinking in the mindset more of backpacking with a larger pack for multiple days with a lot of weight. I wonder how it attaches to a belt? If it's some type of velcro flap/loop contraption, maybe you could just pull it off your belt as a "quick detach" method or something. I may give those guys a call for more info.