I've purchased these quite a few times over the last couple of years.  The last two shipments have been a complete waste of money.  The balls in the last two shipments have not been of the same quality and they crack open within a day of playing with them.  Heck they still look brand new just have a big gaping hole.  The chuck it ball that came with the new chuck throwing stick is still going strong.  I won't be buying these again.