I really wanted to try the Silver and Gold Rejuran products, so I bought this one at the mega sale. The scent is quite strong. I don't normally mind scented skincare products, but this one has the strongest scent, probably the second strongest. The other one I'm using is the Silver Rejuran toner. It improved my skin texture and made the bumps on my chin less noticeable. Niacinamide is listed near the top of the ingredients list, so it's effective immediately! I didn't notice anything with the Silver Rejuran serum, but I might buy this again. However, it doesn't seem to penetrate very well, so it might be a bit flaky in the morning, so it's probably best used at night.