I agree with the reviews that state these should be ordered a size up - I am a size 9 and ordered 10, and they fit well (very slightly loose at the back) with normal socks.  If I wanted a snugger fit I would wear heavier socks.
The only concern to me is the depth of the sole - the treads look to be rugged enough to prevent slipping in moderate terrain but I worry about possible arch injuries/pain if I were to go off trail - I would prefer a heavier hiking tread if that were a possibility.  But again, these are described as trail shoes and fit those needs.