http://i.imgur.com/GrtSSr8l.jpg
I got the gun in yesterday and headed to the range with it to shoot a quick review.
Changes to the gun from previous generations that I've noticed so far:
-ambi slide release
-o finger grooves
-flared Magwell
-"marksman" barrel
-nDLC finish
-2 pin system rather than 3
-high vis mag followers and the base plate is more rounded than earlier versions
-previous gen mag compatible
-fits holsters from previous generations
-beveled slide (but not frame)
My review with accuracy testing and reliability report:
https://youtu.be/2nWIx53xZmc