I tried this a few days ago; I've been wanting to try something with argan oil in it and I found these mask packets in Skinfood. I'm in love with this now, the smell is super nice and it leaves the hair super soft, shiny and smooth. The only bad thing would be the price. I bought the packet because I wanted to try it first rather than buy the bigger tub of product, it cost about 6 USD (for 20g of product; the tube thing costs around 20 USD for 200g).

I guess it balances out if it's a once-a-week-treatment, though. I saw on the website Skinfood only has 6 stores in the US, all in California. This is one store I'll miss from my stay in Taiwan, they have nice products (though on the pricey side :\).