Review (3/5): It's good on its own, even without the other products.
It's recommended that you use this a part of a regimen including other UM products, but those don't necessarily work for me.
This, I use after washing and pre-treatment for the prevention of breakouts, but before makeup.
I do not recommend it while using powder-style foundations, though, as it can "pill" or "flake" while you are brushing the powder on.