I've bought two pairs of these one for my wife and one for myself.  The sole of these shoes is two pieces.  On mine the sole has come unglued.  On my wife's pair the uppers are completely separating from the sole of the shoe.

To be fair Sanuk has replaced one already, but the sole is coming unglued on the replacements.  I'm sure they will replace the other.  What I *am* concerned about is constantly paying for shipping back and forth to keep replacing these shoes.  For $70 I expected them to last longer than 2 months.