Got my prototype red last week.  Played 27 holes with it so far.  Cover seems softer and stickier than my current V1x.  Less spin and straighter of the tee but able to control spin and roll out on the greens easier.  But the cover looks brand new after cleaning it in the ball washer after 27 holes.  Great Ball.  By the way, this is my first time doing this.  Do they tell us what ball was the prototype so if we like it we can get it when it comes out?  This was soooo much fun and a true privilege  Thanks Team Titleist I hope I get to do it again.