Review (3/5): Not long lasting, not demi permanent, color good
I've used over a dozen brands of semi-permanent hair color, and this is in the bottom half. It washes out faster than most brands.
Let's be clear: this is a semi-permanent dye. "Demi-permanent" has an actual definition, which these people ignored completely.
The actual color is good, nice shade of green, and it washes off non-porous surfaces and clothing, like most (but not all) hair dyes. It smells kind of nice, but not amazing, and most semi-permanent dyes smell okay.
Longer lasting brands include Arctic Fox, Pravana, L'oreal Colorista, Clairol Color Crave. Top quality, but less longevity, has been Pulp Riot and Lime Crime. The only one I'd avoid completely is Manic Panic.