A few months ago, I looked in the mirror and saw some grandmotherly-looking woman looking back at me. Yikes! Where did she come from? I realized that it was probably too late, but I decided I wouldn't go down without a fight. I wanted a good Retinol Serum for my sensitive, post-menopausal skin that is also prone to breakouts and after doing much research online, I came across Paula's Choice Resist Intensive Wrinkle Repair Retinol Serum and thought I'd give it a try. The serum feels greasy going on, but when combined with a good moisturizer, it does eventually soak into the skin. Because I have sensitive skin, I have only been using this once a week at night. And because I've only been using it once a week, I haven't really noticed my dark spots or wrinkles disappearing, but my skin does seem to feel and look better a few days after using the serum. I will be increasing my use of this serum to every other evening to see if more frequent use will help...