Bought these for a trip to Yellowstone park. Normally, I am a size 11 wide / 11.5 (dependent on brand), so I ordered the size 11.5. It was a perfect fit. The length inside the shoe was perfect, the arch was in the optimal spot, and the width was plenty wide enough to be comfortable. Neither the length nor the width had a ton of wiggle room to feel like my foot was loose on the inside of this boot.

We went hiking about 2-4 miles per day for the 3 days we were in Yellowstone, and I wore the shoes on average for about 9-11 hours straight before getting to the next hotel room. They were very comfortable the entire day, so much so that when it came to dinner, I just put these back on instead of my loafers.  My feet (which usually sweat in boots) weren't bad either.  Hiking wise I felt they had enough grip where I needed it, and enough flex to go and down the hills and the open trails easily. I may have bought them to use purely for this trip, but these boots make me want to use them more often back home.

I have to add that these shoes were first worn (after trying them on of course) during this trip, so the break-in period was the trip itself. Most shoes tend to be slightly uncomfortable during the break-in period, but these were amazing from the start.