My husband has just done the reiki 1 course. I, too, was sceptical, but seeing the changes in him over the last few weeks have convinced me. I had one session, and it wasn't really for me, but I knew something was happening. Felt heat radiating from the soles of my feet, and my throat felt really dry at one point...afterwards he said there was something blocking my throat chakra. My husband's had lots of similar experiences.
They're starting to use it in sme hospitals in Australia, which isn't that surprising given that acupuncture's been used in hospitals for years now, and they both work on smimilar principles.
As I understand it, it's about channelling universal energy, or life force' and directing it to yourself, or someone else, or something else, in order to balance their energy out. The theory is that unbalanced energy within us can be the cause of illness and dis-ease, both emotional and physical.
Also agree with the poster who said not to go to anyone who insists on a 'course'.if they're any good, then one session will balance you out. You might want more as time goes on and you begin to feel less balanced.
The reiki 1 course teaches you to reiki yourself, reiki 2 to reiki others, and the reiki master course is to make a commitment to reiki and to train others to use reiki.