Well, what is your experience with reiki? That might be a good place to start. Do you practice it? Have you had it done to you? Answering your own questions typically gives us something to talk about and makes others feel more comfortable about sharing their personal experiences, too.
I'll trust that you'll come back to this thread and add your opinion in later, and so you will get mine now.
I've had reiki work done. I enjoyed it. It helped a lot with some tension I was carrying around in my shoulders and neck. I would probably have it done again if I felt it would be helpful for what was ailing me.