glad u askedlol
I have one thats on a tape (its old now) for stopping smoking and the voice is Paul Mckenna (yum voice). It works better through headphones with no outside noises and the voice alternates in each ear at a time, whilst getting you to count backwards from something like 400 say. I would remember getting to about 330 or whatever and next thing he was saying wake up! Do you know I couldnt even TASTE my last cigarette.
Only thing is for it to work well you have to use it 5 nights out of 7 and I couldnt manage it and fell by the wayside.
I have heard people say the slimming one is brill and that after the recording they didnt even want a bar of chocolate !!!
Better done in complete silence, lying on your bed or wherever is comfy and blocking everything out cept the voice.
IT DOES WORK.