Review (5/5): This is NOT a good color to invest in if you're just looking to try something on...
You do NOT want this brand of dye if you make drastic changes to your color frequently [if you want to go from pink to green, for example] because it is extremely difficult to strip and you will damage your hair trying to remove it. This brand is also difficult to dye over, when I tried red for a month it had a VERY pink undertone even after fading and bleaching, other people - specifically Atomic Pink users report difficulty getting even black to go over their color without it having a purple undertone.
That being said, if you actually WANT vibrantly colored hair and don't want to recolor every two weeks this is the brand for you. I have run with atomic pink for 3+ years and just recently decided to fade in preparation for another color, and now, nearly six months after my last re-dye it's just barely starting to get patchy in places and fade at the tips. For that alone I will give this product 5 stars.