My eye circles and puffiness are age/sleep/stress related (not hereditary) so they respond to cosmetic treatments. I have Eyes Wide Open in its new, airtight packaging, which is a click-pen, so the serum isn't repeatedly exposed to air. The only thing I would change about this serum is that it has a strong fragrance. (At least, for me, it's strong). Fortunately, I haven't had any irritation or reactions at all, and it's not a lingering scent. I smell it when I'm applying the serum, and the scent immediately vanishes. I bought Eyes Wide Open originally to be used as a daytime corrector/brightener, but I often use it at night, as well. I never thought I'd be using a blue colored eye serum, because blue tones are what I need to correct in under-eye circles. I did some googling and learned that Eye Wide Open is blue because it contains Azulene (steam-distilled oil from chamomile), which happens to be blue. Azulene has anti-inflammatory, skin soothing qualities and it's widely used for sunburn, irritatione, and many other skin conditions. This serum is not blue on skin, nor does it add blue tones to makeup. I have medium/light olive/golden skin, and this serum appears as a gentle radiance. It makes me look awake and peppy, even when I'm anything but either. I'm 44, I have three kids, and I live in a sunny climate. In addition, I naturally tan very easily, so it's only been the last couple of years that I've learned that sunscreen isn't just for people who burn. Therefore, I need all the help I can get for my stressed skin. I have sun damage in the forms of uneven skin tone, and "smile" lines. Eyes Wide Open compliments concealer by adding a "candlelight" type glow that's flattering, yet very natural looking. It seems to keep sleepy-puffy skin at bay, and I look lively (relatively) in the morning.