Although these boots fit on the small side (order up if in doubt!) I love them.  Thankfully I read reviews and ordered up a half size before purchasing.  I find them very comfortable and warm.  I wore these all over Alaska on different hikes and they were very warm and I did not have any issues.  Sometimes they can even be TOO warm so I usually wore them during colder weather hikes when I wouldn't be in super deep snow.  For my needs they worked very well and have held up great.  Would definitely purchase again.