My wife Loves this product. No more of the dangerous and damaging chemical dyes like she used to use.Now my full review:1st of all, this isn't an Easy or Fast method of dyeing hair. If you need fast and easy, use the harsh chemical dyes. But if you want a product that is safe, easy on your hair, and looks great and natural, read on.This is what we do once a month:1. Wash you hair with a shampoo that will Clean your hair completely. (You don't want a product that has ANY type of oil or conditioner in it). We actually use Dawn Dish-washing Liquid which cleans ALL of the oily products from your hair. Then she towel dries and blow dries.2. We then apply the " Hannah Natural 100% Pure Henna Powder, 100 Gram by Hannah Natural" as per instructions to all of her hair.(We mix the henna the night before and add a little salt, lemon juice, and cinnamon powder. About a teaspoon each).3. This is covered and let on her hair for about 2 hours. Then she showers, with JUST WATER to wash all of the residue out. Then she towel dries her hair and blow-dries.At this point, all of the new grown in gray looks red. (A red-head could probably stop here:)4. While she is blow-drying her hair, I mix the Hannah Natural 100% Pure Indigo Powder for Hair Dye with a teaspoon of salt.This is applied to ALL of the red areas (usually the new grown in hair) to completely cover. With the remaining black dye, we usually streak the last months dyed black hair, in Some Sections, from the last months application. (Gives the hair a more natural look)5. Then her hair is covered and remains on for two more hours.6. After the two hours, she Water Rinses, towel dries, and blow-dries her hair. After only the Water Rinse and NO hair product involved, her hair looks Fantastic! It looks natural, silky, and not dried out and box dyed.7. Days later, if her hair starts to feel 'dirty' to her, she shampoos with her normal shampoo product and conditioner.Her hair looks absolutely fantastic and has a natural brunette look as opposed to the Boxed Dyes.SIDE NOTE:When we first tried this indigo product, her hair had a bluish tint. It was then that we discovered that applying the natural henna first had such a dramatic effect and made her hair look So Natural that she gets comments like: "You are SO Lucky that you aren't turning grey yet...."Now You Have To Realize that dying her hair in this way takes a lot of time on her part (usually about 5 hours every Sunday).For me, however, it only takes about 15 minutes total. When it's time to apply the natural hannah or indigo hannah she just calls me. I could be changing the oil in one of our cars, doing lawn work, etc. etc. but I just come in for about 8 minutes and apply the product for her. (I like to use a 2 inch cheap Flat Chip Paint Brush from Lowes or Home Depot that only cost a buck or two. I found that these cheap brushes work Much Better than my expensive paint brushes.)AND the little 2 buck brush washes out with water and last for over 'A Year Or More'! A testament to how safe these natural dyes are.