Have been using this for a few weeks now and am loving it. I’m already a user of retinol so I went straight for the 2.5% option and have had zero irritation. My 40 year old skin also needs more hydration so when I found an option for retinol and hyaluronic acid in one I couldn’t go past it. Saves me time in my routine which is such a bonus. I also love that this formula isn’t sticky or tacky like others I’ve used in the past, this one absorbs so quickly and smoothly into my skin. Will definitely repurchase!