I've used this for years to help with my puffy and dark eyes. This is very rich and thick, and a little bit goes a long, long way - you're at danger of a massive amount of creasing if you use too much. I warm the tiniest amount between my fingers and press in to my under eyes, and take it down below slightly to avoid the panda effect. I tried using a brush before, but it doesn't warm the product up enough and will apply much too thick and will crease like there's no tomorrow.
One point lost because I definitely need to set it with a dusting of translucent powder. Otherwise, it's perfect.