After using this primer for a couple of months, I can definitely say that it is a winner for me. It has a light scent, but it doesn't irritate my skin. The oil glides on smoothly, even over sunscreen and other skincare products, and after about a minute it is ready for foundation to go on top. The packaging is nice, and the dropper is pretty precise, BUT it does leak a little if it is tipped onto its side. I found this out when I took it on vacation with me, as a small amount of product got out into the bottom of my travel case. Stored upright it is no problem, though. My skin is pretty dry, and of course putting foundation and powder products on can leech moisture from the skin, so this acts as an effective barrier at preventing that. It also feels very lightweight compared to other primers as the oil melds with the skin. I've tried this with several different foundations (Becca, MUFE HD, WnW Photo Focus, NYX Total Control, Revlon Colorstay) and it doesn't really negatively affect the wear time of any of them. For very matte foundations, it keeps them from looking dry or cakey, but it doesn't make them appear greasy. While the improvement in wear time overall is pretty small, it is magic for preventing my foundation from breaking down. I've had this problem for a very long time with pretty much every foundation I have used, and I am thrilled that I finally found a product that helps to prevent this. Finally, if I want to boost my glow, I mix in one drop of illuminating liquid (Cover FX or Revolution) and three drops of the primer oil, and this combo makes my skin look very luminous but not too shiny or reflective. As a primer, this product definitely does everything I want it to and then some. If you have oily skin or want your foundation to wear longer this may not be for you, but if you want a skin-loving primer that will make your foundation look and feel better then definitely try this.