I haven't had the rosalight for very long so its hard to tell the improvements. So far it has been slow progress. The red light dries out my skin. I follow the directions and don't put product of any kind on my face before using and without moisturizer my face is itchy while the light is on. I had pretty bad rosacea but had professional IPL laser before I bought this lighy which was a miracle, but I had some redness left that I just wanted to manage as well as acne vulgaris. I switch between the blue and red light. Once I came out with a blemish on my cheek after 5 minutes of using blue light so I switched back to red for a bit. I wish the timer went by minutes under 20 minutes instead of 5 minute intervals. Overall, it's a nice product.