Thin, poor quality and oversize
Firstly, size. Socks say they are size 6-11 but are just about too big for me (UK, size 9) - and only just hold themselves up. I'm sure after one or two wears, they will loosen to the point that they're too big. (If they even last that long, see below)
They're very VERY loosely bound material. You can pick black fluff off them all day long, and when you take them off at the end of the day, you have wads of black cotton between all of your toes... they're not going to last long at all, and a machine wash is likely to destroy them : /
Last, there's the cut. The toe is cut perfectly square, which means you have to keep them stretched while you put on a shoe, or else they will bunch up and aggravate the large and small toe with the excess material in the corners. Most sock manufacturers avoid square cut toes for this very reason.
Perhaps someone with size 11 feet won't have this last problem as much, but these certainly don't suit a UK size 9 or below. Even if you do have size 11's, these socks are thin, poorly made and will continuously shed their material.
Okay, I've just taken the first pair out of the wash after wearing for one day. Everything else is covered in little black fluff-balls and the sock already has a bare patch. These socks are going to have a very VERY short life.
Perhaps, mercifully short. It's clear that these socks are not meant for this world : )