I discovered Holosync a few years ago, and went through the whole program over the course of about a year. I didn't necessarily experience all of the benefits that other users have reported, but I did find some real improvements in several areas through simply listening to the recordings every night.
One big change was that I became less of a procrastinator. This did take a bit of focus, but I found it much easier to change this habit than I had expected, and now I rarely procrastinate anymore - I don't even think about it - I just get stuff done!