As a former Mechanic who fitted and repaired Air Lockers, I'll be fitting Eaton E Lockers to my Tug when I can (need the $ 1st).
I just hope they are more reliable than Air Lockers. Yes, I am still to establish this to my satisfaction.
The one thing which goes wrong with the Air Lockers is gas leaking past the seals in the piston which locks the side gear, this can be caused from lack of use causing the seals to "Gum up", or temperature effect on the rubber.
The 1 thing in favor of an air locker is when it is going wrong, it will still work and you just have a compressor which is over cycling and gas leaking out of the diff breathers. If you persist in trying to use the airlocker when it is leaking, there is a chance of blowing out an Axel seal as well.
Where as, an E locker, if it goes wrong, you have a tripped fuse and no diff lock.
To sum up, when an air locker goes wrong, it can get you out of the bog still, but seen as they are rearly used, and this lack of use is what kills them, I hope the Eaton e locker is better.
There were some Air Lockers fitted to the 60 series etc with dodgy copper tubing used which would fracture. But that was some time ago.