I got the OI shampoo, conditioner and all in one milk in my box and tried them all together. My hair was certainly very well conditioned and smooth after using the products. First problem though was that the sample sizes of the shampoo and conditioner just weren't big enough as I have very thick and very long hair, so I think I would have had a better result with more product.
The second issue was the smell. It was a very strong chemically smell and it lasted for two days - probably would have been longer, but I washed my hair on day three again to get rid of the smell. It was kind of like that of a chemical hair treatment. I'm not sure if it was the conditioner or the milk - or both, but I won't be using it again, which is a shame because I think the product actually worked well.