I am in love with One N Only Argan Oil. I mix it with my deep conditioner and either walk around under a plastic bag or I sit under the heating cap while it makes beautiful love to my hair. I usually rinse it out but sometimes I have left in over night, either way, my hair is in love with this oil. I was 100000% skeptical when I first purchased the trial size bottle and it really worked but I thought this is the ploy to get me to buy the larger bottle and then it won’t work as well. I am so, so happy to say that I have been using this oil for the lat 6 months, I tried others and sorry, they fail. One N Only Argan Oil, I am hopelessly devoted to you.