I believe that "faith" or Spiritual healing is possible.
I, too, mistrust those who appear to use it for material gain or who make a showy display of their gifts. Much more palatable to me is the case of the woman who, upon learning that my daughter had a brain tumor in a setting where we had not come for that service, said that she wanted to put Lena on her Reiki table to work on her as many times as we could get there pre-op. She has since phoned to ask us if when we could return, does her work on a donation basis, and was chagrined that I paid her as much as I did! So we agreed that I would donate less for the second and respective treatments. (Actually, I paid her less than I do my therapist for more than twice the amount of time spent, so I thought I had given her a less than fair fee, but didn't have as much in my wallet as I'd like to have spent.)
I think LT hit upon something when he said that Christians are often mistrustful because healings also happen in other religions (or with no "religion" at all, just faith in the oneness of the Universe). So much of Christianity holds the rigid view that one must believe in JESUS to be "saved" or "healed," otherwise salvation or healing is impossible. Not so.
The mind, body, spirit connection is very strong, very valuable, and can be utilized in ways not yet commonly accepted in the West to the betterment of one's physical and emotional bodies and one's intellect and intuition. I should like to point out, too, that "healing"is not necessarily "cure." There are ways to be healed of a chronic disease -- acceptance of it and its limitations, for example, while not letting it unduly daunt one's spirit or hinder one from fulfilling one's purpose -- without being physically "cured."
That said, there have been few and far between cases of faith cures being effected, too. As science learns more about the power of thought waves effecting a change in virtually all that surrounds us, I think mankind will learn to use the power of positive thought to its benefit.
"This we Know: The Earth does not belong to man, Man belongs to the Earth. All things are connected like the blood that unites one family. Man did not weave the web of life; he is merely a strand in it. Whatever he does to the web, he does to himself." -- Chief Seattle, 1852