While the truck only sagged about a 1/2" the first time I dropped the trailer on the 5th wheel hitch, I added a set of Airlift 5000 bags to my 2011 F250. I use just enough air to put the trailer and truck back to level, usually 25# or less. I just think it makes the truck set much better in the road. Haven't had this truck a long time and may have really needed them, but I've not been sorry for the addition. The only issue was they were an absolute pain to install on this truck. The airbags were bolt on with no drilling, but the 2011 F250 had several lines that had to be moved slightly on the driver's side of the truck.