My favorite boots ever.  They're super comfy.  The zipper does ride down a little sometimes, but you can't even tel as there is a secondary web keeping things together under the zipper.  If it really bothers you-- you can wear the think velcro blowsings that cost about 3 bucks here on amazon.  I have 2 pairs of them in case I really need them, but never had to.

So it's been over a year and this is a followup review.  These boots are light and very comfortable still, but it does not have any tang or mid sole for stability, which is not good for rugged use.  If you're walking around town on a side walk or flat surfaces it is ok.  They hold up great over many uses.