I have been Chaco brand loyal since 2005. Since then they have been my go to shoe for camp ministry and they get a lot of mileage on them. I prefer the Z2 as it encompasses the toe giving a feeling of more hold to my foot. This does mean you have to get some calluses on your toe but if you know Chaco you know the old saying: "You don't break in Chacos, Chacos break in you."