I tried Olia because it was advertised as being gentle on your hair, no ammonia. I must say it is the worst hair color I have ever used.
My hair became so dry and frizzy, and stayed that way for a very long time. I was searching like crazy for a good conditioner (home remedies as well as store bought) and no matter what I used it was to no avail. Also my hair began falling out like crazy, I was almost a crazy person. The color lasted only a couple of weeks before the gray was coming through.
I dared not color again because my hair was in such horrible condition. Will definitely not use ANY garner products.
Reason of review: Bad quality.