Bought these not for the hyped sliming effect but because they were REALLY comfortable.  REALLY.  Wore them everywhere for months.  Then all of a sudden I started falling.  I have NEVER in my life sprained my ankle (I'm in my 40s) and within a summer I had badly severely sprained both.  My partner suggested that perhaps it was these shoes and I doubted him until I did a little research.  I discovered women younger than I am have destroyed not only their ankles, but have had to have knees and hips replaced at ages younger than I am.  Wear them at your own risk...seriously ladies they didn't do anything for how my rear looks plus they ruined my ankles.  It's amazing how much you really need your ankles, don't think about them much til they stop working.