I've used the product, but I don't have cancer. The thing to make note of now is that the product has changed. It used to be green, and tasted like kiwi without the sweetness. Now it is a golden orange color. I have not tried the new product yet, but am expecting a bottle. While the company and distributors say that the product is the same, I don't take that as a fact. It's clear to me that it is a new product.
I liked the original product and think it has great potential in the areas of health promotion/healing, and will be personally testing it on a continuing basis.
Since every person is different, you can get the best information on the product by trying it yourself, because the response others get may not match yours at all.
The first time I took the green limu, I got very thirsty and got a headache. I skipped a day before taking it again, and had no more problems. I did feel that it was promoting my health.