I really like these shoes, now that they're broken in.  That process took a while--a few weeks of daily wear--and it involved a lot of pinching around the base of my big toe and rubbing at the back of the heel.  The sole is made of some material I've never seen before, and the outer layer has shredded away, almost like a giant eraser.  There's still plenty of sole left, however, and it doesn't seem to have gotten any worse since the outer layer wore away.

Even with those initial discomforts and complaints, the shoes are worth having.  They're comfortable, zero-drop (as far as I can tell), and easy to wear all day.  They show surprisingly little dirt, even on such a pale tan color.  My kids step on my toes often enough with dirty boots, and the muddy water quickly dries and fades.  They stay on without slipping, too.  I usually wear an 8 or 8 1/2, and the larger size was perfect.