http://www.hypnosis101.com
It cracks me up when I hear some hypnosis instructors talk about depth of trance. In general, they fall into 2 groups; those who think deep trance is absolutely necessary for any progress and those who don't place much importance on depth of trance at all.
Many old-time hypnosis instructors teach that somnambulism (a deep trance) is absolutley necessary for lasting change.
Just think about it for a minute...