I haven't, but was reading up about it the other day because a friend said "my friend had your cancer and didn't have chemo or radiation and cured himself using essiac tea". You know the story, we have all heard them.
I find this site is quite helpful when people tell me about a friend of a friend that had 'my cancer and cured it':
http://www.cancer.org/Treatment/TreatmentsandSideEffects/ComplementaryandAlternativeMedicine/HerbsVitaminsandMinerals/essiac-tea