I ordered a size up based on earlier reviews saying that these run small. I don't actually find that they run small, but they DO run narrow. My pair only works for me because I ordered the size up. But, some people might find them to be too narrow.
I've also read that some people don't like the extra mesh that Keen added to this year's model. I don't find it to be too confining and it still very much feels like a sandal.
The length of these sandals were true to size. I wear 8 1/2 to 9 and my feet are on med with so I ordered 8 1/2 . They were narrower than my old pair of keen cycling sandals but they seemed to fit ok. They are a little stiffer which I like.