These are nice socks... I got some from the original Kickstarter (and just ordered more in this drop). A few notes:
-- Very comfortable & breathable, with padding in all the right places.
-- They "pill" a bit more than regular dress socks, but so far it hasn't affected their durability.
-- The "left" and "right" socks are different (they're labelled on the bottom). It's a bit weird, and it'll take you a few extra seconds in the morning, but you get used to it.
-- My size 9.5 feet work pretty well with the Medium size... they're *bordering* on a bit small, but I like how they don't come up to my knees like so many other dress socks do, so I re-ordered the same size.