I’m a fake blonde and used a brown gloss and it made my hair wayyyyy darker than I wanted. The smell is awful but worth it! It’s super easy to use and is a watery consistency so it’s easier to distribute throughout your hair. I left it on for 15 minutes and it took 99% of the unwanted color out of my hair, it did take off the pervious toners I’ve had on my blonde hair as well so I was super orange and brassy after washing but was fixed with a toner & gloss and was back to normal! I didn’t notice any damage to my hair, and it wasn’t dried out at all so it was very moisturizing. Great product!