Hi there. Sorry for the delay in replying.
Well, the VQ Cd seems to be quite effective in giving me a 'state-shift' (feels like going alpha-theta), especially when I'm relaxed and can clear my mind.
One of the most notable experiences I've had with it thus far is a deep state of relaxation where I was presented with a series of images (sometimes with common themes, other times seemingly unrelated) flashing across the 'screen' of my mind in rapid succession.. very vivid.. much more vivid than 'physical reality' (the images were lucid.. 3 dimentional.. had -and I hesitate to use this term, because I do not mean it in the conventional sense- 'temperature' .. and more.. everything appeared to be in very sharp focus).
It was similar to experiences I've had a couple of times while in deep meditation. Every once in a while, the stream of images would stop... then restart. Almost like I was rising from that state, then re-entering it. The weird thing was how the images seemed to impose themselves on me (don't know how much sense that makes).
I think I'll keep my trusty tape recorder handy from now on so I can try to do some image streaming the next time it happens.
I really don't feel I've been using VQ for long enough to tell you much in terms of its strengths, long-term effects etc. I'm still just playing around with it.. I'll probably add it to some paraliminals to see how it 'feels' as compared with paraliminals dressed with binaural beats. Brian649 is, I think, in a much better position to tell you more about VQ.. I believe he's been using it for quite some time now (perhaps going on a year).
Hope this helps. Take care..
Sceptor