I've been using it for 1.5 months, but I'm starting to notice fine lines and pores due to dryness under my eyes. Because it contains a fairly high concentration of glycerin, it seems to be actually drying out my skin. It worked well on uneven skin tone and radiance, but that disappeared when I switched back to Environ skincare. It's a shame it doesn't suit me. The texture is a little thick, and using it late in the morning can smudge makeup. So, I apply it immediately after cleansing my face and applying Lactope Lotion, then layer on my toner and cream after a while. One pump in the morning and evening is enough, so I think it should last for more than two months. The biggest benefit I've noticed is that my skin tone has become even! I can now wear no foundation. I also notice a noticeable increase in firmness and radiance. I love skincare and have tried all kinds of skincare products, including Environ, Gaudi, BA, Obagi, and Cosme Deco. Recalca is my current favorite brand, combining the best of doctor's and department store cosmetics in effectiveness and feel.