It's interesting - a few friends have used hypnotherapy, with different results. I know one gave up smoking immediately (and I mean immediately and is still a non-smoker decades later!),and another said that it was fantastic for relaxation. Others were less successful, but maybe it is something to do with being willing to use the process.

What sounds good about your bloke is the work beforehand. As in many things, what presents itself is not always the root cause and taking time to look at that is probably vital.

Sounds like money well spent.