My doctor ordered that I wear the Birkenstock.  First pair was a sandel.  This is a great enclosed shoe - fits well but I believe I'll order 40M vs 39M to get just a wee bit more room in the toe length.  The soft back (at the heel) could use a pull tab or something -- I find I need a shoe horn most of the time.

Would purchase again - would appreciate more color selection in my size.