Review (2/5): Wouldn't recommend.
I've used Manic Panic Amplified for years but decided to try this because Manic Panic hasn't been lasting as long as it used to. I had high hopes for this but was very disappointed. I left the dye in for at least an hour before rinsing with cool water, but the color wasn't nearly as vibrant as I expected it to be. Additionally, my scalp and face got very itchy while I had the dye in my hair. Being the fast learner that I am, I decided to try the dye again the next day. The itching on my face and scalp started much faster this time and my neck also got very itchy. Still, I assumed it was a coincidence because who's actually allergic to hair dye (despite the warnings to do a strand test)? So, a few weeks later I tried it again, and the itching started even faster that time. I decided I wasn't going to use this on my hair again but had the bright idea to squeeze some onto the back of my hand when I was applying it to my niece's hair. Within about 30 minutes my hand began to itch and burn. I don't have sensitive skin and have never had an issue with dyes before so I'm not sure what's in Sparks that isn't in Manic Panic.