I had never owned a pair of Ryka's before and was semi-impressed.  My right foot was leaning far into the inner seam of the shoe when I first tried them on.  It took lacing them a few times to fix it and it still makes my foot slightly tingly.  I can only wear them for a long time unless I am working out.  They don't do very well on concrete and they are not for standing for extended periods of time (I cannot also use them for work, something I expected).  Other than all this, I do love the way I can jump and shift from foot to foot with ease.  The pads on the bottom do not slip and, when laced right on my right foot, both feet have a perfect fit!