works well but hold your nose [SEP] the product did what they claim it will without damage to my hair i wanted to dye my hair back to my natural color which is about a level but the color i bought was too dark this color reverse did the job the smell is awful though i washed my hair after rinsing twice and still couldn t get the scent completely out it was so bad i had to shampoo again the next day before i couldn t get rid of the stench it smells like someone permed their hair and then puked on it i am happy with the results though