I used a duo mix of 8 / 7.43 to get an auburn shade on my mid brown hair. My hair was a washed out light copper with grey in my regrowth so decided to use the permanent colour. Applied to the roots first then the rest of my hair. The thickness of the mix is good, it doesnt run and doesnt have a chemical smell. I have a sensitive scalp and didnt have any problems after using. The conditioner is great, left my hair very soft and shiny and again doesnt have a strong smell. Very pleased with the finished result and I will be using this going to the future as its easier and cheaper than going to the hairdressers every 8 weeks. Recommended!