Amazingly comfortable, at least from what I can tell from the two I purchased so far that are too small.  I run a solid 9.5.  The first pair I ordered in a 9.5.  Too small.  I figured the 10 would do.  Nope.  Had to go back in today and order the 10.5.  If the 10.5 isn't long enough, I don't think I have the stomach to order an 11!  I'm hoping they're as comfortable as I think they are from what I've tried on so far.  I'll come back for another review once I've actually worn them.  And hopefully I can give them more stars.

I also have problems because while my foot is a normal width, due to the fact that my foot doesn't have a lot of meat to it, shoes tend to gap on top.  If I try a narrow width, they squeeze my toes, so normal width is the way I have to go.  I have yet to find a nice heel (or any shoe for that matter) that my foot doesn't swim in.  This shoe, however, fit my foot like a glove.  I am really looking forward to finding the perfect length because I have a feeling these are going to be the heels I've been searching for all my life!

All I can say is order a full size larger than normal!