Amazing simply, the longest lasting I have seen in a dye of this color. The only downside is that wherever it touches, it leaves a stain so be careful when using it

it did not dye my hair even through I used the instructions. I got the silver violet and it did nothing. Not even a blue tint, I don't know if it's because the die isn't pigmented or the darker dyes work better but this one did not work

The best dye for such colors and non-oxidizing. Of course, you definitely need Elumen Lock to have long-lasting results for months!

The best by far from all the others I had tried in the past and with long-lasting in the purple shade that I use

I have been using it for years in the NA@2 and BL shades as I avoid oxidative dyes. I used to buy it from Germany until it became available here.

Each bottle lasts for 2-3 applications on my shoulder-length hair. I don't have any gray hairs.
I have tried all the deposit only dyes on the market (manic panic, directions, etc.) and this is the best by far.
It lasts longer, doesn't ruin everything when you wash it out of your hair, and (most importantly) it is transfer-proof: it doesn't transfer onto pillows, clothes, skin, especially if you use the lock after dyeing. That alone is enough for me to choose it, as all the other deposit dyes ruin everything until the first 2-3 washes.

I would give it 5 stars if it was truly permanent, but at least on my hair, it's not.
For others, the result is permanent, according to reviews.