The biggest plus with coil over suspensions is usually the ride. In the case of the XV stuff, as I'm the only one here with any real experience having worked on every car they ever sold, is they do ride really good but they have many drawbacks. At track speed they can perform well, but the tuning/springs rates as they were sold are far from optimized.
I know the bashing will start, but remember, just because I made a living at that place for almost 7 years, it doesn't mean I agreed with everything they did. I still had a boss to deal with.
IF (big IF) the product was further developed it could have been a truly world class solution for mopars. However, at this point, I feel there isn't enough of a market for this product which is why I never chose to pursue producing this type of product on my own.