I installed a set over the weekend and am finishing up the plumbing for the air compressor and in-cab control now. Hopefully by end of tomorrow, that will be all done.
They haven't made a significant difference in ride quality that I can tell (so far anyway) and they'll sure help when I put my 4500# Lance camper on the truck.
Besides, Airlift has a 60-day money back guarantee (Ride Quality Guarantee) so if you don't like 'em, you can return 'em.
Installation is darn easy compared to the ones I had on my '96 and '01.
Rob