I have only tried on - plan to use in a few weeks.
I am an 8.5 and the 8 fits well.
I purchased this shoe for a trip to coastal Central America - beach walking, cave excursions- and figured excursion companies would requier a closed-toe shoe for some activities.  As Keens tear up my upper-heel and I love my Kamik snow boots, these were an easy choice.
The shoe is very comfortable. The straps seem very secure.  The back heel strap has 2 velcro sections (right side and left side) which I think is a nice touch.