Review (5/5): Lovely, fun, vibrant pink!
It's VERY pigmented, so prepare to slather a lot of conditioner or Vaseline on areas you don't want it to end up on. I used this to "correct" my color when I realized that my hair was too warm for an ash brown look on my dark brown hair no matter how much I try to tone it (and I really don't prefer a second bleach session) so I said "fork it" and worked with my warm hair. I like how it ended with a gradient of salmon and vibrant pink tones, and it's much more uniform than the stark blond and copper streaks I started from. And it helped condition my hair after all that intense bleaching. My hands were slightly pink when I washed off the color (I usually don't use gloves at the rinsing point and for most dyes staining wasn't a problem) - not a big issue for me, but take note.
I have yet to say anything about the longevity since I quite literally colored this morning, but I do plan on using a color depositing conditioner in between colors, so I hope it'll last for weeks and the fading remains pretty. Hot pink is my new favorite fantasy color!