I walk in the Avon Walk for Breast Cancer, so I do a lot of training walks.  I've been at this a few years now, and have tried several different kinds of sneakers.  These NB give my toes and widest part of my foot room to wiggle, yet the heel is well padded and secure.  Also, the shoe is lightweight, without being too minimal.  I know minimalist sneakers are the big thing right now, but when you're walking 20+ miles, you need more structure between you and the pavement.  I bought this 2nd pair to start breaking in now.  I'll be walking the Boston Avon Walk in May of this year, and these puppies should be ready to go by then!  And if someone you know and love is walking to end breast cancer--support them!