Fit (i.e. I found the sizes to be just a bit off) - I wear an 11.5 but didn't get a good fit from an 11, 11.5, or a 12. Ended up going with 11.5, but it was too small. You can stretch the Gore-tex so that the shoe feels larger, but in the end it was too snug. Not sure if there's anything Patagonia can do about this...it's probably just the way different shoes fit different people's feet.