Try it once..worth using but expensive

so I tried this and it worked for me as I have mixed white hair and not white strands at one place..it looks natural as there was no smell,no itching,no reaction..quiet easy to mix n apply..later on I tried this to my mother and she has lots of white hair in front ..it gave just grey color and white is visible clearly..not that effective but I read you need three application of this product to get the exact coverage. I will try this..one packet contains three sachet so it's quiet expensive and suitable for one person only . ordering again to see if it works in another two application for my mother