We have several things in our home that require distilled water (or at least they run much better with it). I guess the options are buy it by the gallon or buy a device that makes it for you at home. I've looked at a few and have no idea how much I can trust them. Anybody here do it and have a testimonial, good or bad? It looks like some of the machines are less than a hundred bucks. Just wondering if that's a waste of money or if it works well enough to rely on.