This product is a fantasy hair lifesaver. I have very dark hair so attempting fantasy color was pretty much use less before I found this product. First, I tried some blue highlights and they turned green (and not a good green; kind of pool green) right away and then faded to where you couldn't see them at all after a week.
I can now keep my highlights bright and vibrant for months. Not to mention, that the product smells great and leaves my hair soft without making my hair greasy.
I do want to add that at first I did not use the once a week touch up but I highly recommend it especially if you have dark hair. It looks like I went back to the salon every time I use the once a week product.