They're grrrreat!!! I never even knew one could color their hair jet black simply using henna and indigo. I purchased a henna/indigo kit from Empire's online store (http://mehandi.com). It was shipped to me swiftly and the contents were fresh. They included simplified instructions as well as a link to their website where I could download an illustrated in depth pdf. I followed the directions exactly as recommended and my hair is a natural looking black and I didn't use any peroxide, ammonia, ppd or any other harmful chemicals found in commercial dyes. Simply water, fresh squeezed lemon juice, henna, indigo, and time... My only problem is the price. I bought 2 kits for $15 each and had to pay $13 in shipping. They lose a star for that, but I will definitely be doing business with them again.