i think the products work well and i like the hair serum alot. I like that the hair serum doesnt make my hair look oily and even adds some volume. I think the shampoo is good too, but I have to use alot for the product to lather and really wash my hair, so I wish the bottles were a larger pack size. I think both the shampoo and conditioner bottles are really small- almost like a travel size, so I think they should be larger, for sure, even with the monthly subscription. Those with long hair will go through the products much faster.