I just love this boot.  I like the whole style of it with the zipper up the back and the little strap across it.  It did become just a minor annoyance that the strap would pop open as I was wearing them.  It did not pop either because the shaft is too tight on my calf...it just pops open as you move in it.  I have probably worn about 30 times and now the zipper is separating as I wear them too.  I don't even use the zipper to put them on either, I slip them on instead.  As I said---a cute boot, but if you are looking for a boot you will get a lot of wear out of, just don't think they are made all that well.