I heard a lot about The Ordinary products and chose this as I thought it may help brighten my dull, tired skin. I haven't seen an improvement in skin tone or brightness. Its very dry product, with an usual sticky texture. Smells "unscented", it has the scent of the ingredients not a fragrance so if you like the sensory aspect of a product's smell, this will disappoint.
Tacky to apply, and absorbs quickly but left my skin wanting more. Possible to use over a water based serum or oil, so that might help. I use it as night as it doesn't sit well for under make-up in the day.
Overall, underwhelmed but not so terrible I'll throw it away.