Get it. I installed one on my 97 and I'm never turning back. It works just the way it's supposed to and it does it's job well. There are some minor noises in tight turns and some while coasting around turns on freeway, but other than that it's perfect.
Select ability is a key attribute for front lockers and a nice plus for the rear. You probably don't want to put an Aussie on the front.
Just make sure the air lines are tucked away nicely, or you might lose your ability to lock 'em up (until you are able to repair the lines). I had an o-ring pop out on my ARB compressor once though it was easy enough to loosen the end bolt and put the seal back in place before retightening.
Our 80 is my wife's daily driver and she has hardly noticed the Aussie since I put it in last week. I haven't had to worry about winter driving yet so I can't give feedback there but at this point I would say it's very liveable in a DD.
As for ARB's up until this Aussie, ARB's are all I've ever had. I love em. The selectable nature of the ARB is hard to beat. They are super strong and if can keep from damaging O-rings and air lines, they are very reliable. O-rings can be a common issue but they are minor. As for the air lines, there are places you can get stainless steel lines. But I just used some rubber fuel hose and slide it over the airlines as protection from abrasions and other road debris and rocks. I never had an issue.
The reason I went with the Aussie this time around was almost entirely cost. In addition I drove a friend's 80 a little on the Rubicon and some on the highway driving back. He had a lockright (for all intents and purposes the same as an Aussie) and I never even noticed it was there. That assuaged my concerns about a full time locker in the 80. The ease of install of the Aussie is way more convenient than an ARB as well. If I had money to throw around I would have done ARB's again, but since I was on a budget the Aussie got the nod, and I have been very happy so far. No regrets.
X2 .. if your 80 it's a trail rig that only see on road time when you drive to your off road park .. nice ..
I'm one more happy ARB customer for mor than 5 years now .. no leaks, no breakage, no air lines issues, just I have no lockers on the street and get locker when really need 'em, included some muddy off camber situations where you really don't want a auto locker ..
I have had my aussie for about two years now, and I am completely satisfied. It has made a big difference in offroad performance. For the price and ease of install, I think it took me and a friend 2 hours, you cant beet it.In the rain I dont notice any difference having the aussie. As for the snow I havnt been in enough to really make a good call on that.