I've used Chronologiste three times since receiving it last week and so far I love it.  I'm using it every time I wash my hair because I can't resist.  It smells incredible and helped repair some major damage from ombre highlighting (my colorist used 40 volume to lift the ends) Needless to say my hair felt damaged and was breaking and I'm happy to say I've noticed a huge difference after using Chronologiste.  Yes, it's pricey but well worth it if your hair is in need of damage control from coloring but if your hair is healthy and in good condition then you should pass on this.