So, I went down to Hotchkis Sport Suspension this morning in sunny Santa Fe Springs, CA and they installed their prototype tubular rear bar on my 2014 FiST. They also installed a pair of adjustible endlinks on the front, but did not install a front bar. My initial impression, based on a few blasts on freeway onramps is that the rear bar didn't make the rear twitchy at all, and the car does feel like it's cornering a bit flatter. There is a Hotchkis R&D test in a few weeks, so I'll see how it affects things under more intense driving. All in all, based on my experience with their MINI stuff, I think the Hotchkis bars are going to be great for our cars.