Bought these based upon reviews, and I have to say that they do not run oversized.  At least not on my size 11.5D feet, as I ordered the 11M boots.  I think a 12M would've have been perfect on my feet.  These are snug with regular athletic socks, and it is next to impossible to tuck my jeans inside them because of the felt liners.  You will end up rolling up the cuffs of your pants, to get them into the tops of these boots, if you plan of any wading into calve high water/mud/much.  I imagine they will work fine when wearing Thinsulate 'long johns' and Thinsulate socks, then putting an insulated coverall over top.  Which is my normal snowblowing attire.

They are much more comfortable than unlined boots, however, no telling when the comfort will disappear due to the felt liners eventually compressing.  Although, it shouldn't be too difficult finding felt liners for replacement.

Tread design is decent, overall quality is good.