My mother has been using it since I have seen her doing it for the first time. She trusts Super Vasmol Keshkala 33 blindly because of some obvious reasons. Some of those reasons are like it doesn't contain any Ammonia content( Ammonia is dangerous for hair health), It lasts longer than other so called hair color, it doesn't leave hair dry and grey after using it one, infact it makes hair very black and shiny, it is very affordable and even very easy to apply on the hair and easy to cleanse it off too. It doesn't leave bad smell on hair.
So basically apply Super Vasmol on hair and leave it 60 to 80 minutes and then cleanse it off with luke warm water to get the maximum results.
Totally recommended.: -)