The best boots I have ever owned.  They keep my feet very warm and dry.  They are a bit large, but nice for thick socks.  No blisters either.
The upper part is made of neoprene, like scuba suits, so there is a bit of stretch to it, but they are not loose.  You can slide these on quickly and just go, no lacing, no leaking, no worries.  If you are looking for a great boot for when it is really wet out, this is the one.