These boots were excruciatingly tight when I first got 'em, and they weren't available in the next size up without paying 33% more, so I stuck it out with a 10-1/2.  Glad I did (but would still like to have the 11).  After several miles-long walks they stretched out.  They're still a bit tight so I wear thin wool socks, but it acceptable.  Not so warm in the winter, but I suspect it's because there's virtually no air gap between my feet and the boots.  All in all, I really like 'em and might even spring for another pair in 11.