Hi there!
Self esteem supercharger only works for me when I have a positive and clear intention with it. I say it aloud and then it happens. More than not.
A different tape that has helped me is Anxiety free. It makes me shake the social anxiety I have with people. It's marvelous.
In my case, it's best to start with anxiety free since beeing with people which I feel uncomfortable with brings me down. Self Esteem is best for me to do second/secondarily (?). That way I take away the thing that bothers me and then build up the extra confidence.
Well, it works for me.
Tore