See my update below. i changed overall rating from 3 to 1.
After using Clairol's Nice n Easy for years I had resorted to using 2 boxes of the Clairol's Root Touch Up each time to cover my grays (ie whites) because it was so much more convenient to leave color in for 20 minutes than 50 minutes. I also preferred the thicker (more controllable) consistency of the Root Touch Up. The small amount you get in the Root Touch Up makes it relatively expensive, since I needed 2 boxes just to cover my roots.
Long intro, I know, but that is why I decided to try the Perfect 10. There were great reviews here, and they were half price at Ulta, so i bought 4 boxes in 2 shades: Lightest Cool Brown and Medium Ash Brown.
I tried the Lightest Cool Brown, using half the box, planning to cover just the roots. I took my time and was very careful about not missing any areas. It probably took 20-25 minutes to get all my roots, and since the instructions said you did not need longer processing time for stubborn grays (unlike with Nice n Easy and with Root Touch Up instructions), I set the timer only for 10 minutes.
I spent a really long time rinsing, but the color still bled on to white towel after conditioning and rinsing again. The conditioner, by the way, dramatically made my hair softer and moisturized/re-normalized.
I realized after the shower and especially after my hair dried that the roots on only half my head had been colored. The white roots on the other half of my head were blond. Sad, since my hair is between light and medium ash brown.
As usual, I waited 48 or 72 hours to wash my hair and the hair dye bled into my white towels again. I had used the kit's conditioner again too. In about a week, it was clear that the grays had not been covered very well at all on the 2nd half of my head.
I was really bummed because I was going to be away at conference and networking in New York for 2 weeks and my grays were showing on half of my head.
I called Clairol to ask if I could go ahead and use Root Touch Up for the 2nd half of head with the roots that did not get covered. I told them I thought it was because the dye had not been left on long enough.
The Clairol person said that the solution is meant to be used in 10 minutes and that because I had taken too long, the solution had weakened in the bottle after I had covered only half my head.
Does this make sense to any of you? (Update: 5/22/17: I just watched a youtube video of someone who said she only took 10 minutes to cover her grays, and the 2nd half of her hair stayed gray after the 10 minutes processing time, while the 1st half grays did get covered after the total 20 minutes time.)
The Clairol rep also had said I was not allowed to use the Root Touch Up because I needed to wait 4 weeks to use it. She said I could have called right when I colored because they would have advised recoloring right then. At that point, she said my only option was to go to a salon. And she took my address to send me a coupon for another box of any Clairol hair coloring box.
I waited a few more days and decided to ignore the Clairol rep because I couldn't go to NYC looking like I had gray hair. So at the 14 days time, I had my mom help me color my entire head with regular Nice n Easy Medium Ash Brown.
It covered everything and made my hair dry as straw, but as soon as I conditioned with the conditioner from Perfect 10, my hair felt conpletely soft and normal again. And the grays were all completely covered.
I am going to try Perfect 10 again and try to go a lot faster. And leave it on my entire head for 20 minutes. I'll report back with an update.
I still had 2 boxes of Perfect 10 in Medium Ash Brown, so I decided to use one when my grays started to show. This time, I completely prepared to use the squeeze bottle and go quickly. I also started down the middle (after going around forehead of course), and then alternating sections to the right and then to the left. I completed in around 10 minutes as the Clairol rep had instructed me. Then I set timer for 30 minutes. My hair came out really dark, but I thought my roots were covered. I waited 48 hours then washed my hair (with sulfate-free shampoo) and now I see that the roots are a completely different color.
Final verdict. It might be fine if you have NO grays, but the package claims 100% gray coverage and within 10 minutes. Neither was true for me. I'll never buy this again and I wouldn't recommend it either. It retails for $14-15.