If you have ever seen how much traction is improved by deflating your tyres (or installing wheel chains), you will not doubt the usefulness of these devices. In my opinion they are a better priority than adding a winch or diff locks (and cheaper at about A$200 per tyre), though you might add the latter as well if you are cashed up. Mostly you can get out of trouble by just deflating your tyres and reinflating them, and not get cold and muddy.
This robust inner tube allows tyres to be run at low (or even zero) inflation increasing traction by as much as 40%. Also a great safety feature in the event of a blowout, or you could look at them as representing another FOUR spare tyres. So much more convenient than the messy job of fitting and removing wheel chains (though I would always recommend carrying them still). It always seems to be wet, muddy and cold when you need them – I wonder WHY that is? I have tried Diff Locks which have a tendency to smash some other part of the vehicle (eg Prop Shafts) probably marooning you somewhere very difficult for rescue and recovery (as we have found out from bitter experience). Limited Slip Diffs may be a better option. http://www.secondair.com.au/why.htm
Stuck on the Butchers Country track 30/03/2013