Thanks for taking the time to answer my question. My primary reason to listen at night is to go to sleep and I have to say that I hardly ever get past the very beginning so they seem to be very effective. (I do try to say an intent just in case)This is my second month listening to the tapes and I have to say I had a good laugh yesterday when I tried to remember what tape I had used duing the month of March. I finally went to check since I have them in a type of order. I had a good chuckle when I saw it was "memory supercharger". But I also have to add that my memory does seem to be somewhat better--