I am very happy with my Yellows, I was within 0.9 seconds per lap on a very skilled driver in a brand new 911 GT3 on an 82 second course this weekend (not bad for being up on weight, down on power, and costing about $150,000 less). The main issue that I am now having is that I corner hard enough to lift the inside front tire about 2 inches off the ground on almost all corners, but that is more of a soft spring, stiff bar, combined with unibody twist issue (it does this on my street/road course tires, 285mm Bridgestone RE-11s on all four, it is worse on the Hoosiers). I can also attest to the Yellows being very durable, I let a friend drive my first 2014, he rolled it, and three of the four survived.
2014 Mustang V6-Built to run TTB, CAM-C, and ESP
Proving to my fellow racers that the disdain that some GT drivers have for V6 drivers is unfounded, one results archive at a time since 2013.