Initially, I had my doubts but when I wore them, I realized how much value for money this product is. I wear a size 43 shoe and they fit perfectly. They don't scrunch up in the heel area, meaning they hug the foot adequately. Their length is just right to cover almost the entire calf, although due to the one size, they do tighten a bit more. For me, this is not a disadvantage because I prefer socks to be slightly tight. Otherwise, they are soft and warm, and during moderate hiking, I didn't feel any discomfort or irritation on my feet, although they did sweat a bit.
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Edit 22/04/2023: It is true that they shed, but personally, after each use, I turn them inside out and quickly collect any lint that is on the sock by hand. This way, I have never had a problem with lint on the carpet or floor.