With winter suddenly descending upon the East Coast, my sensitive skin was reacting to the drier environment and becoming so dry and flaky that my regular intense moisturizer wasn't cutting it anymore. I decided to do some searching to add a serum-type product underneath when I found this! I have never seen such an immediate improvement in my skin - and with no irritation, this serum is a God-send. The only problem is, if your skin drinks this in as much as mine does, the bottle won't last very long. I have to use 2-3 pumps, both morning and night, to feel uber-moisturized. Doing the math, it lasted about 90 pumps... which for my crazy high usage is only 15 days, but for others with more normal skin needs (1 pump a day?), this could last as long as 6 weeks! Even though I go through it so quickly, I'll be buying over and over again until the dry winter season is over - such a great product!