A few caveats. Paraliminals are hawked by one firm so there is no way to compare their effectiveness. Most rational folks with a scientific or economic bent of mind will either roll their eyes at these tapes or denounce them as psychobabble bordering on pseudoscience. If you are not of the ilk who would consider mind-body or alternative therapies as an option, you might as well stop reading this piece, let alone try the product.
Paraliminals use a triple whammy approach to accessing and moulding the unconscious. The tape begins with a background of binaural beats, which are of a certain frequency that tap into your subconscious mind. The Internet is full of these. Go into YouTube and you can find alpha, beta, and theta waves; binaural beats, Sofreggio frequencies, chakra balancing ringtones, and all sort of tosh claiming to open neurons that have happily remained closed.