I've looked at those in the past, but I have gone with the Hellwig overload spring setup on the last 2 F150's I've owned.
These just work for me and I think cost a little less?
They have made it so I don't 'sag' by about 2" just dropping the tongue on the truck and with the WD bars set, AND my 1.75" front level, still keeps the truck essentially "level" even when hitched up to my heavy #7000 TT.
Good luck! Mitch
2013 F150 XLT 4x4 SuperCab Max Tow Egoboost 3.73 gears #7700 GVWR #1920 payload. 2019 Rockwood Mini Lite 2511S.