I'll respectfully disagree here.
My current Tundra with my FWC is my 4th vehicle ive run airbags on and never once had a leak or an issue.
Its all about the install and doing it properly. Folks i've seen with leaks and such almost always have the onboard compressor setup installed and that tends to be the source of the leaks.
I run the HD Firestone bags, simply plummed to rear bumper and use a hand pump, they have never leaked a pound.
I run the Daystay cradles and have done almost all of Moab, Big Bear and the back country of Death Valley with zero issues, flexes great.
When done right airbags are awesome. When cheap bags are used or you have a improper install, they can be a nightmare.
My .02