Review (2/5): Not a very good product.
The only reason why I continue to use this product is because it's the only hot pink dye that is both affordable and convenient (you could purchase it at Walgreen's). Other than that, it's terrible. I have naturally black hair and the instructions said that the bleach will turn my hair the accurate color in 1-2 hours. However, it took 5 hours to bleach a small strip of my hair to dye hot pink. 5 hours! And it still didn't bleach all the way. The product itself is horrible. Instructions state that if you leave the dye in for 30 minutes, your hair will remain vibrant pink for 4 months. However, this product washes out of my hair with every shampooing, leaving my pink highlight a nasty, neon orange color. You literally have to reapply the dye and complete the entire dying process over again after every wash. It's so time consuming and such a hassle. Though I know it's harming my hair, I resorted to combing the dye through onto my highlight and then straightening it with a flat iron to dry.
Will not be purchasing this product again and will definitely be looking for a new one. I've finally come to my senses and realized that $9.99 could be put to much better use.