I heard several times about a knee walker. My aunt did a canvass one time for a knee walker and got this:
http://www.quickfindwheelchairs.com/store/10-4075961-B000FNP1RY-Rolleraid_Knee_Walker.html
They told my aunt that this is the most user friendly knee walker due to its wheels swiveling in place even as you glide along. Do you think this is a perfect choice?