I bought holosync 6 weeks ago and have been using it virtually everyday. I play it lying down just before going to sleep. I think I noticed a shift a couple of days into using it, but nothing since. I certainly don't experience a meditative state and sometimes I feel agitated and irritated.
I also bought the insight cd and was thinking of making a present of it to my mother. I find it less agitating than the holosync cd but wonder whether it is as powerful? I know holosync is guaranteed, but wonder how long it is worth persisting with.