I've heard about these for such a long time that I decided to give them a try and see if they lived up to the hype. A little background: I am a skincare junkie. I take really good care of my skin. I have some fine lines around my eyes, and will occasionally have some puffiness. I've never had a problem with dark circles.
I used these as directed. They were comfortable to wear, barely noticeable. I mention this because many sheet masks/hydrogels can be uncomfortable and bothersome. I liked that I could slap these on and continue my routine without worrying that they would fall off or slide down. They stayed in place and gave me no issue. Once I peeled them off, I could see that around my eye area looked brightened and tightened. It's hard to explain, but they work.
What is also worth mentioning is that around my eyes FELT cooled and toned. I can see why these are routinely used in the fashion world and by celebrities. They would be extremely useful to brighten and freshen up the eye area after little sleep or a long night. I haven't used them long-term and cannot say they make a difference after long-term use, but they are an amazing tool to freshen and brighten the eye area.