I have lost count of the number of times I have reordered this serum. It works really great for me. I have a dehydrated skin that leans towards dry with hormonal spots. I can always tell when I have not used this serum for a few days, as my skin just looks duller and more uneven pigmentation-wise. It is a silicone-based product and provides a smooth base for makeup. I like the slightly denser feel of it, compared to a water-based serum. It has not broken me out - I generally find that it makes my spots less angry. So, all in all, a fantastic product!