Good fit, good support, but the firm and high arch support put too much pressure on my sad, cartilage-less knees.  I tried wearing the slippers twice, each time for about 30 minutes.  Felt great sitting or standing but when walking, my knees felt horrible.  Took them 2-3 days to recover each time.  I really tried to like these slippers, even tried a second time but ended up sending them back.