My wife has 1/2 of one knee.  Her gate is difficult for her.  She is a teacher, on her feet all day
Comfortable and supportive shoes are critical for her health.

I had tried a different (actually a more expensive) pair of shoes for her but we ended up returning those and I had to scramble to find a pair of the kahanas.  These are her favs and shes reeeaaal  fussy.