I really like the Secret Brightener. It's one of my favorite products. I have a lot of trouble with dark under-eye circles and when the makeup artist at Saks used this on me I could definitely tell a difference. It really seems to brighten up my undereye area with a bit of shimmer. I use a makeup brush to blend it in because I've noticed if you don't blend well it tends to show in the fine lines and wrinkles. My only qualms are that it is a bit expensive (for me, anyway) and that I wish it was packaged a bit differently. The twist pen usually puts out quite a bit of product. As someone else noted, maybe if Laura Mercier would put it in a small pot or a better adjustable pen that would help. But regardless of those aspects, I've had a lot of luck with it and will definitely buy it again.