"Wouldn't all of life's problems be eliminated if these were really useable and effective?"
Life will still throw challenges and problems your way. No self improvement technique will eliminate all your problems (life would be boring if it did). If it is the feelings that you associate with the problems that come up then that is definitely within your control.
I believe that paraliminals are extremely effective for positive conditioning. In my experience I have had to use other tools to release much of the negative conditioning.
Will the memory supercharger (for example) make your life better? Well it has improved my memory and ability to learn.
