I suppose that, as for any audio device, there is the possibility of operator error or a system that is not up to the task or ears that are not up to the task. I'm quite confident that some playing around with location of the Christmas Tree ornaments, especially if there are more than one or two, is mandatory to obtain the results that are realizable. There are simply too many rave reviews by all the major magazines and positive customer testimonials over the years to take negative reviews too seriously. We see this sort of thing all the time with Shakti Hallographs, Shakti Stones, Mpingo discs, Schumann Frequency Generator, VPI Brick, SteinMusic Harmonizer and even power cords and fancy fuses.