I had used a henna product when I was much younger , and just a couple of times. I watched several YouTube tutorials because I had forgotten how to do it . I am very glad I did. I am 50 precent grey . Very salt and pepper . I have a couple of medical conditions that , over the past couple of years , have prompted me to get away from boxed hair dyes that contain too many harsh chemicals . I have tried many semi and demi permanent hair dyes in that time, but as I am so grey , they are not semi or demi permanent at all. I'd have to use them almost daily to keep the color in my very stubborn grey hair . So I decided to try Henna . I usually go with a very dark purple. . . my favorite color . I mixed the henna and oh Lord , the smell was far less than desirable . Pee eww! So I mixed an essential oil in it to mask the smell . I am really glad I did. Made a huge difference . The box said to leave the colorent on for 30-40 minutes . But my experience with grey hair told me to leave it on longer ( So did a couple of YouTube videos ) I mixed it till it was a gravy consistency , and I started at the roots in the front of my hair part by part , bit by bit to ensure all those pesky grey hairs were coated . It started to dry and get caky real quick , so I grabbed the spray bottle I have for my plants, and kept my hair moist . Then , when I was very certain that every strained was coated from root to tip , I gave it another spray down , and tied a lovely shopping bag around my head. I went to bed with the crinkly bag on my head , and woke up 7 hours later , got up and rinsed it out . I could tell right away that it worked . My hair looks like I used a boxed hair dye , though the color of purple is not as vibrant as I would really want it to be .... All my grey hair is colored over . That right there is the most important part! There is no brassy color just a nice warm very dark brown with a hint of wine color to my hair . I am very happy with the results , and highly recommend this product . There are a couple of things that I should let other shoppers know ...First , on the initial application , there was a slight sting , much like the box dyes , but that faded very quickly . And second ... I have very very thick hair , but , it's very short , styled in a 1920s style bob . I would recommend buying two boxes for shoulder length hair, and three for hair that goes down your back . Even for my shart hair , next time I order this product , which I definitely will be reordering , I plan on getting two boxes . And third thing I need to let other consumers know , my hair felt very dry after the rinse out of the dye . I would suggest a good leave in conditioner or good hair oil to apply after you rinse out the Henna. Love this product . I highly recommend!