I first wore Birkenstocks in 1990 when I attended UT in Austin.  They had a slight hippie vibe and were great in warm weather.  Between 1989 and now, a lot of things have changed, so to find something that has been consistent great quality for over 20 years is unusual.  These are the same great quality as they were 20 years ago.  Highly recommended for anyone who wants a shoe that will make their feet healthy and a sandal for warm weather.