A year or so ago I had an incredibly nasty reaction to the castor oil I was using to try and regrow my brows, so my upper eyelids were red, irritated and became droopy in the inner corners. At that time, I purchased an eye serum from La Prairie, which really worked like a charm to fix the condition, but that price tag, though! The Kiel’s serum is not cheap, either, but it is far more reasonable compared to La Prairie. I liked what it’s doing for my upper eyelid area: I have deep set eyes, which I’ve noticed that are starting to lose elasticity a bit, but this serum does help to make them look perkier. It doesn’t seem to do much for my under eye area, though. I hate the pump packaging, which is really tiny and hard to control, so it dispenses too much, imo. Because of my experience with castor oil, I wanted to proceed with caution, and not use too much in the beginning, so for me one pump is enough to do both my eyes, and I only use the tiniest of tiny amounts. So far it hasn’t caused any irritation, and I love the unscented, clear gel. It’s high summer now, but even in this hot weather I don”t think it’s moisturizing enough on its own, so I only use it at night layered under the Mizon Collagen Firming Gel.