The creator of the H2O is Henry Ho. Henry is a good friend of mine, though we live a continent apart. I had his fine class A monoblocks for a time. Henry tutored me through several component changes. I could say, I am returning the favor as a good friend. It's easy though, and self serving. I have heard many amps, and I have yet to hear the equal of the H2O at any price. Henry's amp will be the least expensive of my recent amp purchases. That is my reward. That, and the satisfaction of seeing a friend do good.
Henry is a lone entrepreneur now. He is presently pulling a pool of experts around him, to facilitate a quick amp turn around. My job of chief cheer leader isn't done yet. I will be giving a proper review of my system here within a couple of weeks.
Over time, I have made a lot of noise over other components, and took some flack for that too. It bothers me none. I can see how someone might misconstrue my enthusiasm for salesmanship.
I encourage any amp challenge to the H2O. So far well reviewed digital amps such as the eAR, PS Audio, Rowland, and Evo Gen2, have been compared, not to mention a good number of conventional amps. Owners of these amps have been voting unanimously with their check books for the H2O.