As a gadget-obsessed, active, outdoors person, I regularly find myself looking for a place to top-off my electronics. For the last two weeks I've been used my iTorch to charge my phone, ipod, tablet, GoPro camera, and usb-powered external speakers while camping, fishing, and playing disc golf. The 5200 maH of extra power has been plenty for what I've needed, and the device is small, light, and easily portable. No negatives experienced yet. I would definitely pay extra for a "tough" model that is water and damage resistant. Not that I'm worried about its durability, but given my outdoor lifestyle, it would be nice to know it won't fail if my backpack gets wet.