I love these shoes. They are my new everydays and I just ordered a second pair. I tend to find one pair of shoes that work for my feet and wear them daily.
I have very large bunions and it is not comfortable being barefoot. Negative heels take the pressure off the ball of the foot, so I have been wearing Earth Shoes (now Kalso) exclusively for the last 15 years. I have Earth shoes in slippers, sneakers, boots, dressy and casual styles.
Sadly, the selection at Kalso has shrunk so I decided to give Altra a try. I have always ordered 8.5, but my new orthodics don't fit well, so I went up to a size 9 in these. At first, they were perfect, but after wearing them for a month or so, the toe box has relaxed somewhat and my toes are just hitting the end of the shoe. Not uncomfortable, but I am ordering another pair in a size 9.5 to try. They seem sturdy enough to me. I walk 3 miles/day in them as well as all day wear.