I've dyed my hair every color in the book, and after using many brands of hair dye, 'N Rage is my holy grail of dyes. I've been using 'N Rage Twisted Teal for a year now and I can say that this is, without a doubt, the BEST demi hair dye I've ever used. The color is THE perfect shade of beautiful teal that I expected. If used properly, this color can last longer than most. I currently dye my hair around once a month, sometimes I can even get away with 6 weeks depending on how often I have been washing my hair and applying heat to it. It's best to use on very light hair. The whiter the hair, the brighter the color will show up. But even if it's used on a dark blonde, the color will still show pretty vividly. When it fades, it fades to more of a green color on my hair, but my hair doesn't hold blue dye very well. But even faded, the color is still bright and gorgeous! Another thing I like about this product is it smells yummy, just like bubblegum! I never realized how much a hated the smells of other dyes until I started using N Rage. One thing to note is that you need to be very careful when applying this product because it will stain everything. Make sure to apply petroleum jelly along your hairline and neck (or all over your face like me, I'm very messy) so it doesn't stain your skin. After dying I cant wear white shirts for 2 or 3 washes because it will stain the neckline around my shirt. Aside from that, the only other con I can think of is the packaging. They used to sell their dyes in an upside down squeeze bottle, and I wish they still did because sometimes this product can be extremely hard to get out of the bottle. Overall, this is the absolute best demi hair dye I've ever used. I'd never go back to Manic Panic or other leading brands.