I love the Mizuno Wave Riders from 5k's to marathons.  I'm a fast runner, and the Wave Rider 14 & 15s were perfect.  They gave me just the amount of stability and support I needed & just light enough to run fast.  And then I tried the 16s thinking for sure they'd be better with the lighter weight.  WRONG!  These shoes kill my feet.  They hurt so bad they made me hate running.  I tried three different distances and every time I was limping for a week.  So I stocked up on 5 pairs of Wave Rider 15s in case they stop making these.  The 16s shouldn't even be called Wave Riders.  It is a completely different shoe.  One star doesn't do justice for these shoes.  NO stars is more like it!