This product has my hair colour the most even it has been in years of doing my own hair at home using many different products! There are many pro's to this product including: - Smells GREAT (not like stinky peroxide) - Colours evenly and really well - Easy to use and easy to follow instructions - Doesn't burn (like some others) - Is effective and efficient However, a couple of cons; - It's a little messy in application from a bowl rather than a tube - Personally, I have 2 tone hair (I only dye 3/4 of the top) so it was more difficult to ensure the colour wasn't going into my darker underneath as I was using a bowl and brush to apply - If you have alot of fine hair (or thick hair) you will need two packages as there is limited product. All in all, I'm exceptionally impressed by this product and will be back as a customer to get some more just before my birthday party (when my hair will be next due for a colour)