For $61 I expect this treatment mask to be filled chock-full of amazing ingredients. The ingredient list is totally pedestrian and has cheap filler sillicones- which I do not use. Lindseed oil is nice- but there's hardly any in there.
I could find better hair masks at the drugstore (and for more rational prices too.)
I gave a 4 on the sample size not because I like the product, but to let Birchbox knows that if they're going to send foil package-style samples, sending multiples of it is the way to go at least (if it's not going to come in a nice deluxe sized mini bottle/jar, etc- don't send only one foil sample that you only get one use out of).