Last weekend I went to Kiehl's specifically to get this product -- their Powerful-Strength Line-Reducing Concentrate with Vitamin C and Hyaluronic Acid. It's supposed to help decrease the appearance of fine lines and wrinkles, and to improve skin radiance and texture. I've read really great things about it. All Kiehl's products are amazing and, from my experience, they all deliver! I've used a bunch of their products and they are all extremely good -- but also extremely expensive. This little 50ml bottle costs 59€... but I have some fine lines on my forehead and on my smile line that slightly bother me... And if this works, it's totally worth the money.
If you haven't tried anything from Kiehl's, you totally should. Plus they give you samples of almost anything -- even if you don't buy anything.