It's only day 4 after coloring and one wash. However my side grays at my temples and by my ears are completely covered. I have never been able to have a peroxide color mix stay on my hair for more than a couple of days. I must say I am elated. I am also able to save my leftover color and unmixed developer portions to use for the next time. I put a date on the calendar and I will see how long the color lasts. I must say that my hair is even softer at the temples I have very thick coarse hair. And now it feels soft. So far I am loving it. I had reservations because it does take a long time to get to the USA. But now I will just order ahead on my next order. I do not have a subscription.