I have worn Mizuno Wave Creations for 3 years and I absolutely hate the changes they made to the 16 series.  The shoe is much narrower then the past styles and the fabric is much stiffer and does not allow as much stretch and flexibility as the past series.  I typically go up 1 size for this shoe and now it feels to short on top of it all.  I have 3 races coming up and had to find a new shoe quickly.  I switched to the Prophecy series by Mizuno, took my first run in them and they felt amazing!