I don't think this product is for everyone. Don't expect that the concealer will remove your dark circles like a magic wand or something, we all know that's impossible. Though I do think it's a good product to make you feel better. It gives me the feeling my eyes are more "fresh" after putting this on right after getting out of bed. I feel wide awake immediately. Second, it does hydrate my eyes very well. I can have these moments the skin under my eyes get very dry and this really helps!
My advice: if you don't need a good coverage because you don't have such a dark circles, don't use it :)