Personally, I think 'Power from water' may be a little misleading.
The Reactor is a hydrogen fuel cell, the Hydrocore is the fuel bottle, and the Hydrolizer is a hydrogen generator and compressor.
Yes, the Hydrolizer generates hydrogen from distilled water, but it requires electrical power input. And the system is still going to operate at a loss overall. I mean that you are never going to get more power out of the Reactor then what you put into the Hydrolizer.
Cool technology, for sure, but not to be confused with free energy.
I also find it amusing that the manufacturer points out that the Reactor is 'clean' energy. However, the Hydrolizer requires 10 - 19 VDC input. So unless you have a 'clean' source of DC power, using the system isn't as 'clean' as they would like you to believe. I guess running the Hydrolizer while you are traveling (engine running anyway) would minimize the pollution.
OK, so I guess I'm busting on it, but at 2A @ 5V, I can't imagine any application that wouldn't be served just as well by carrying extra batteries.
Granted, it's small size and light weight might be an advantage to backpackers, but do you really need to "charge an iPhone through its built in USB port up to six times" on a backpacking trip? And is it smaller and lighter then one of those little phone charger battery packs? Wouldn't a small solar panel be a better option?
So, prove me wrong. What are the applications?