I'm rather new to the forum (although I have been reading along for a while now), but I have been listening to paraliminals for about eight months now and have had some nice results.
I initially starting listening to the self-esteem supercharger and to talking to win to prepare for an internship abroad where I knew I would have to interact a lot of with other people as well as give a presentation in English (which is a foreign language for me)
I alternated the self-esteem cd with the talking to win cd for daily for about two months before the internhip started. There, I found myself not only working much better with others, but also for pretty much to first time ever socialising with the other interns after work (something which I used to avoid). That might not sound like much, but being autistic (asperger's syndrome), it's quite a bit of progress for me.
Since then I've tried some other paraliminal CDs, namely memory supercharger and personal genuis, and have also noticed an improvement in my grades, from D's and C's in spring to solid B's now in the end-of-year exams last fall.
I found that, at least for me, the key is to focus on one or two paraliminals at a time and listen to them regularily for several weeks.
