I am familiar only with the Rife Beam Ray.
I know two people who were cured using it *after* chemo/radiation failed.
One had prostate cancer - 2 months cured.
One had merkel cell carcinoma - 2 months cured.
Quackery is when a guy in a white costume gives you radiation and poison drugs and most of his patients die a humiliating death.
To each their own.
Bellflower,
Please tell me what else you would like to know