Hey y’all I bought this from Amazon a month ago for $10.00. Originally was $100 when it came out. (now$6.49) I thought why not try it as I had a Carver Sonic Holography generator many years ago and like the effect. My system is a Oppo DV970HD with SACD, DVD Audio, and HDCD. This goes through a Bravo Audio V2 tube headphone amp and Sennheiser HD650 phones. Thats it except for connections treated with Deoxit. I was mildly surprised, and impressed by the effects. For sure the sound was more open, wider sound stage. Much better clarity on instruments. I use only the first setting and not the second which has excessive bass for the HD650. Make sure the device is charged. I listen to a lot of HDCD disks, mostly Grateful Dead, other Rock, and Jazz. The separation of instruments, esp percussion is really noticeable. The effect is not artificial, nor does it add any distortion that I can tell. I now do all my listening with this device activated. Does anyone else have one? For the money you gotta try it. I have been watching Mr. Zeos for over a year now, and enjoy ALL his stuff not just the hardware and music. Love Chewbacca.