i also bought this with the shampoo. my friend said it's the same as the salon ones (start with a K) but it's much cheaper. i have to apply it at nite and leave it overnight. it's quite easy to use and the smell is alright. my scalp feels less tight and the hair seems to be thicker/stronger. she said i need to use it for 4-6 weeks. I am wiating to see the final result.