Just spent 10 days hiking the canyons and plateaus of the Colorado Plateau in these. Here are a couple of points to note:
1. The size is big. I typically wear a size 10 running shoe, but needed to go with a 9.5 in this shoe. The 10 was just too big and my feet slid all over the place. (Got a pair for my wife as well, and had to return and move down 1/2 size.) Order down 1/2 size when ordering online, and you probably won't need to exchange/return. I wear different brands of merino wool socks, which are heavier than cotton, but not as bulky as the heavy ones I wear with my Vasque's when carrying heavier loads.
2. As noted by other reviewers, the first couple days were slightly slick, but wore in nicely. No real ankle support - so if you need or are used to ankle support, might not be the shoe for you.
3. Stepped in a few mud holes (they don't grip well on wet, algae covered rock), and they rinsed out/cleaned up nicely.
4. They breath, but not as much as you would think. My socks are damp after wearing, even in Utah! But, not enough to cause friction blisters.
Short review, but in conclusion I think that they are going to be the choice when hiking Rim-to-Rim later this fall, getting picked over the Vasque's, due to the lighter weight and overall sturdiness. Great shoe and worth the 5 stars after the initial wearing. If needed, I'll amend the review after a couple of months.