First, these seem to run big.  Most of my Clarks are a 10 C/D, and these are at least half a size too big (maybe a full size).  They're soft leather, they fit my 17" calves, and they are very cushy.  The problem is, the heels seem like they are hollow, or have air pockets in them.  After wearing them for about a month, one of the heels "popped" -- it's still intact on the outside, but the inside air pocket seems to have caved in, so it's very, very bouncy, to the point where it's hard to walk in them for any length of time.  Also, while the elastic inset in the back does allow these boots to accommodate a wide variety of calf sizes, it looks very tacky, especially since the rest of the boot seems like a decent quality leather.