I mean honestly I'd never buy it.
But slamming it because of its price without understanding what the components alone cost is just silly, and clearly you don't know how expensive a couple of the included parts are by themselves. Those trac4 Baer brakes are 22% of the price by themselves. Considering the cost of some of the components that are part of the system the price is not out of line. If the website was a little easier to navigate I'd feel more confident in a comparison, but like-to-like for parts on the kits that are currently on the market and it looks to me like the price is competitive. Certainly in the ball park.
One thing that definitely should be covered by them is some kind of suspension geometry plot, because they moved the suspension pick up points which has the potential to completely alter everything about the suspension geometry. Now, that could actually be a GOOD thing, the other coil over conversions out there are using Mopar suspension points with MII spindles and things so there are drawbacks that you might be able to improve on by moving the suspension points. But to know whether they made it better or worse you'd need to see the plots.