Hi there,
I've tryied the surrender file by Mistress Samba a few time ago thinking that was just another average dom file and I must say that was my best erotic hypnosis experience...
She can take you as deep as you can possibly be, still can't remember everything from the trance but I think it's a good sign since it was the first time that kind of suggestion work with me and 'ive a lot of experience with hypnofiles...
I can only suggest you to give it try
now I know who is my true Hypnomistress