I have tried herbal inn. The new herbal inn does NOT work at all. The old formula, which gave much hype to the product, contained mercury, but it really worked super fast. After their site shut down, and reopened, the new formula is just different. Not only did it not lighten me, it wasn't even able to maintain my shade. I actually got darker from it. So anyway, hope this helped.. spend your money somewhere else.
Im using herbal in 5% right now, for about 1.5 months, so far its working good. I think to get any dramatic results mono should be used in combination with it. Im not currently or have i ever used mono.
They claim with continued use it can become permanent. I highly doubt that unless you have vitiligo or some other condition which systematically irradiates melanocytes.
Im just going to use mono at a low percentage, id like to completely depig eventually.