Looking to add the below described part to my 2012 F250. The bags have a lifetime warranty and have gotten good reviews. Anyone use them here and if so can you offer your opinions?
Thanks.

Air Lift Part 57396 - LoadLifter 5000 Leaf Spring Leveling Kit

 

Yes sir, I have those airbags on my truck along with the #25856 HD Compressor with dual analog gauge and would not be without them. Installation was a bit of a pain, but only because my truck has frame mounted brackets for a SuperGlide 5er hitch that had to be removed first.
I had the same brand of bags on an '03 Chevy Dmax for 9 yrs with zero issues. So far there have been zero issues with them on my '12 Ford 250 CC.
FYI got mine from SuspensionConnection.

 

This is probably a bit late seeing as the last post was August, but for anyone else reading this, I also put on the Load Lifter 5000 bags on to my Excursion. I chose the wireless option.

Pros:

• Works as described - I run about 15psi not towing and bump it up to 65 psi when towing. At 65psi I get 2" of lift at the ball from the bags, then the trailer drops that down 2 inches, so I run as level as I do unloaded.
• Easy Install - took me maybe 3 hours and half of that was plinking around making sure I liked the compressor location. I chose the "Wireless One" option so I wouldn't have to route the air line to the dash gauge - and to let me start/stop the inflation/deflation process from the rear of the truck while I'm hooking up the safety chains, umbilical, etc.

Cons:
--Cons are more for the Wireless One unit than the bags themselves--

• Must use a compressor dedicated to the springs (can't use an air tank)...the electronic manifold on the Wireless One units are "one way" monitoring...they can't support springs at say 50psi and a tank at 100psi...they will bleed off until the tank and springs both hit 50psi
• If you have an issue with your remote (for example, the batteries die - don't ask) - you can't adjust the bags. If you manually add air, it will bleed off to the last setting you had programmed...if you want less and try to bleed manually, the compressor kicks on to try to compensate.
  
  If you have a remote issue, you need to disconnect the electrics to the manifold and fill/drain via the schrader valve (so when you install, be sure to make the manifold wiring harness easy to get to and ensure you install the schrader valve where you can get to it). I'm actually going back to add a switch on the dash to disconnect the manifold to save me future drama.

Overall: If you think you need these, get them - they are a breeze to install (with the wireless option), work GREAT, and if you plan a little ahead - you can do it without touching the interior of your rig.