I can’t say anything bad about these. This truly do work. I had some dark spots, that other serums, brightening creams couldn’t fade, so I tried this. I was skeptical but it worked. I used one every day for 6 hours as directed. One of my dark spots disappeared and now I’m working on another dark spot with this product and the dark spot is fading. Definitely give this a try! It’s reasonably priced and worth it.