Muck and Bog boots are very similar but they don't fit the same. For me, Mucks just didn't fit right so I went with Bogs. It depends on your foot shape.
I wear them all the time around home in the winter but they don't have the needed support for Rocky Mtn elk hunting. On milder terrain, they'd be great. I've never got cold in them but I've never sat on a stand, either.