hi
you may have found one now, but i have to say that i've never heard a bad thing about any hypbobirthing instructors (and i work with a LOT of women who use hypnobirthing)
they just seem like a totally lovely bunch!
people say equally great things about the Natal Hypnotherapy CDs that you can buy
whoever it is who does the course, the most important thing is that you and your partner practise the methods at home
i also often recommend the book the Gentle Birth Method, which has some lovely visualisations in it too
good luck with it all
Julie (private midwife)
http://www.neighbourhoodmidwives.org.uk/