I installed one on my 13 RT about a month ago. So far I am very pleased with it. The ride did not change in the front, maybe slightly stiffer in the rear, but the handling is much better. A lot less body roll when cornering.
I also installed the adjustable panhard bar and airlift 1000 bags at the same time. The install is really not hard, did it in my garage over a weekend, taking my time.
So far no wobble up to 95 mph, that's as fast as I've had it with the kit installed. It actually feels smoother at speeds over 75.
The only thing I don't like is how the new spindles move the front wheels out about 1/2 inch. Not really noticeable unless you really look for it.l