Great color but allergy alert!
Pros: Beautiful, vibrant color, pleasant fragrance, and easy to use.  Cruelty free and vegan friendly.  I used this in a rainbow hair look (see pic).  Cons: minus one star because all of their dyes contain Methylchloroisothiazolinone and Methylisothiazolinone, which are added as an antimicrobial/anti-fungal.  These are known to be common allergens and repeated and/or extended exposure can increase risk of reaction.  Imagine the feeling of sunburned poison ivy on your scalp.  I am personally VERY allergic to this chemical, so I can never use these dyes on myself  :'(
Rating: 4 stars