Keens started these hybrid sandal/trainer shoes and I've stuck with them since.  However, I just couldn't pass up the price on these Teva's.  Now I am certainly glad I purchased these.  The Teva's are a functional improvement over Keen Arroyo's. First impressions are that the Teva is lighter, sole is stiffer and less soft which IS what one needs for an all-terrain go anywhere shoe.  The added buckle strap and heel adjustment cinches it for me, far improving the fit of the Teva over any Keen's I have owned.  I am glad a larger shoe company like Teva didn't just play catch-up and has improved on an innovative design.

UPDATE: 6 months on and bottom tread completely delaminated from the rest of the shoe.  I have tried a couple of glues but it continues to separate in areas where I had not glued before.  I contacted Teva and they acknowledge a past issues with the shoe's construction but won't send me a new pair without my returning the old one. Anyone know if this problem has been solved? The design of this shoe is great.  It is too bad Teva couldn't apply better adhesives.