I decided to purchase the no.3 serum to try it out. I'm so glad I did! When I first initially started using the product, I felt somewhat disappointed. It did not irritate my skin but it seemed like it did well...nothing. But ofcourse I was determined to finish up the product. I wasn't about to waste product or money! I was struggling with acne and dryness a lot. No matter how many products I used my skin was still rough, textured and breaking out. I decided to simplify my routine. I decided that this would be my day time serum. After using this serum consistently, I noticed a welcome change in the health and look of my skin. My skin texture became less apparent. I also struggle with PCOS and I noticed a significant reduction in my breakouts. My pores became less visible. This product only works when using it consistently.It sinks in well. Slightly tacky. I think it'll work for all skin types. It's hydrating, not heavy and works well under makeup. Use generously to see results. Love it.