I use this product along with a few of the other products from Dermalogica's Age Smart line, and I am very happy with the outcome.
I began using the Hydrating Booster this year. Each morning, I apply a small amount to the few spots on my face that tend to feel a bit drier than the rest, then I apply the Super Rich Repair followed by a Dermaligica Toner and Moisturizer.
My face looks and feels more moisturized since adding the Hydrating Booster to my regimen.
The Booster is great, but it's the entire Age Smart line to which I give all the credit for what I consider to be my great skin.
I highly recommend these products.