Oh my god, I just applied streaks of this tonight so I can't speak to it's staying power (tho most other reviews say it lasts a long time!) but this is definitely one of the prettiest, most vibrant shades I've ever put in my hair: Green Ivy. Haven't done the wild child hair thing in years but as a teen I dabbled in Manic Panic (always sucked) & a brand I forget the name of (was actually good) but I think Sparks might be the best- and it only cost me like $7 at my local beauty supply store! I have half blondish, half dark brown hair and I thought the results on the bleached hair would be more vibrant and turquoiseish than the dark brown, which I assumed would turn only a very dark, green-tinted hue. Man, I was wrong... the highlighted bits didn't turn out much more vibrant at all than the dark brown bits; the dark brown bits turned out equally as vibrant AF! So if you're going for one of their darker shades, like a darker red/pink/purple or green/blue, and your current hair is brown or lighter, I wouldn't even bother with peroxide (& any time you can skip peroxide is a godsend to your hair!). Anyway, 100% enthusiastic about the Green Ivy, the coverage over dark hair, the value (!!!) and hopefully the staying-power too (the woman at the beauty store told me that since I wash my hair only once a week, it should last about two months or more, but to watch out for styling products with sulfates as well FYI).