I use this gel every evening before going to bed and in the morning. I usually apply it before my moisturizer or night cream. The green-clue gel includes these little yellow balls that are supposedly filled with certain vitamins to enrich the skin. It does add a neat texture to the product, but I find that if you get too many of these little capsules when applying it to the skin, it can leave a sticky residue. Overall, I recommend using a very small amount of the product. It comes in a very small package because a little goes a really long way. If you use too much, you'll get some unpleasant results.
Because I'm in my early twenties, I can't speak to the anti-aging properties of this product. However, I have noticed that it really reduces darkness and fine lines, even when I haven't gotten a lot of sleep. Whenever I take a break from using it for a few days for whatever reason, I can usually notice the difference for the worse. It definitely reduces my dark circles, firms the skin, and leaves a smooth finish if you don't use too much product. For the cheap price, you can't beat the results.