I used up all of my Resist Retinol Serum and needed a new serum but thought I'd check my options... The thing I love most about Paula's Choice products is that you can get samples or travel sizes of EVERYTHING! I got a sample of this and fell in love. It has retinol too, but the added benefit of antioxidants. My skin glows after using it and looks so firm and beautiful in the morning. It is thicker and very, very moisturizing. The texture may appear "oily" on your skin at first, but I promise it absorbs completely and leaves does not cause acne for me at all! Love love love.