The product is great. Fades nicely. And the smell is tolerable. To get the maximum color you do have to process your hair. A nice pale yellow works best. On silver hair a process is still required but not mandatory for the color to penetrate for longer lasting color.
I use Pulp Riot hair stain every three shampoos. The colors are richly bright. I love this product and have it in purple, pink, and blue along with this green.