First of all, I live in the desert southwest where water is the limiting factor on a lot of hikes. Before I could answer your questions I would need to know several things: first, how is the unit's performance at low relative humidity? (as I write, the humidity outdoors is 4% at 105 F); how is performance at high and low temperatures?; what volumes of water could one reasonably expect under a range of atmospheric conditions? what does it weigh?; what would it cost? I guess what I am getting at is this: if it weighs 2.5 pounds, will deliver <100 ml of water per hour at a RH of 6% and costs $250, I wouldn't even consider purchasing one.