Right out of the box, very comfortable with room for my toes..( So many shoes seem to crunch toes together, these don't).
No break in period. I hit the pavement and had no issues at all. Laterally Stabile with great arch support, and not hard on impact. Great for walker-runners like me. And the shoe is a good looker, not silly like some of the
circus pinks and bright lime green things I have seen people wearing.