I choose the Arroyo because I wanted a hiking, water, working sandal, with a sole tough enough to stomp on a shovel in the garden with. As soon as my foot landed in the shoe I knew I was keeping it. The foot bed offers great arch support and contour. But over the course of living in the shoe, I have some regret. As noted by others, the shoe seems to run about 1/2sz long. But the width on my foot is snug at the widest portion. The heel cup has a bit of gap to it and the cinch doesn't do much to snug it. I am glad for the extra room at the toe- it enhances air circulation. The side cut outs do not really offer enough ventilation, so your bare foot in these will get sweaty and uncomfortable. It would be better as a totally closed shoe, because it feels like a totally closed shoe, with the slots offering little more than an avenue for debris. Great to hike up stream beds, but not nearly as fast drying as other Keen models, so you go around with that wet shoe feeling long after you leave the water. The shoe is quite heavy, and while the foot bed support is good, there is little shock absorption so your feet feel tired before the day is over. That snug fit at the metatarsal? Feels pinched after a day on your feet. Best comfort is to wear with socks to absorb the perspiration the shoe holds, but what I wanted was a shoe for bare feet that would be great for long hikes and creeks. This really isn't it.