Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
Just as described, fit nicely, look like really good quality (hopefully they will last a while, I'm sure they will). Only thing I'd mention is that they are smallish, which isn't a problem for me, but I'd say if you're past EU/INTL 39 in shoe size, they might be a bit of a squeeze because they aren't very stretchy.
The stitching is a bit strange at the toes and was already coming undone when I got them; looks like they’re very cheaply made (though that’s expected at the price). They’re warm enough and the colours are accurate but definitely not the best socks you’ll ever get. But you get what you pay for. I suspect they won’t last long