I use the highlighting kit and it works great. It's more natural looking than the standard highlighting kits I used to use from the big brand names. I just mix it and use the provided brush to paint it on wherever I want highlights rather than using the cap. The color is very natural as long as you don't leave it on too long. I'm careful to keep it off my face, neck, and scalp. I wish they would offer it in a form so that you could use a squeeze bottle to apply it. That would make it so much quicker and easier to apply and I would use it more often! My natural color is medium to light brown and I only leave the product on for a short time (basically 5 minutes or less after I finish applying it) so that there is not too much of a contrast, for a more natural look. I also do the lower part of my hair first so it doesn't lighten too much at the top. The color does not wash out and my hair stays healthy and shiny. It takes some practice and is helpful if you have someone to do the back for you if you have long hair. My advice is to experiment with just a little at first for a minimal amount of time and then adjust from there.