I have used Holosync for some time few years ago. I used level 1 and 2 . It did bring quite deep meditative state which lasted some time after CD-s. There were also some health benefits.
But SF Qigong has ( for me) much more powerfull efect on flow of energy and health. And this in quite short session so it is very time sparing - with 25 minutes of practice you get many , many hours of feeling good and being productive.
I would say that Qingong acts beneficcially in many different ways ( breathing, movement, flow of energy, visualisation ...)but holosync is only affecting the brainwaves.
Still combination of holosync and Qigong might be a good possibility.
