I have a BellTech 964SP 2"/4" drop kit on my 2014 R/T RCSB and have absolutely no complaints at all. I've put nearly 13,000 miles on the setup. I did install the shorter F150 front sway bar end links and a fully adjustable Sphon rear suspension. But even before the Sphon parts the truck rode and drove as good as, if not better than stock. Had I seen all these negative threads I might have rethought before I bought.
My only complaint is the bump steer and camber issues, other than that it rides very well. smooth but firm. Oh and my inner fender contact, that needs to be addressed once I figure out why I have it. I think its a modified 2/4 drop to a 3/4... ass sticks up about 3/4" too high for my taste. Just haven;t had the time to put it up on the lift and inspect the lowering job by the previous owner.
I still plan on changing to a spindle drop with maybe a 1" lowering spring up front... Still researching and designing out my options on that route. I love where the front tire sits just not the rear
Here is my ride height on 22's with 285/45's