I have good experience with ABLS since the Disco I had for 5 years uses essentially the same system. It was very difficult for it to get stuck in snow/ice, but I'm sure it would have been stuck as well in that situation. Heck, even with a locker you may not have gotten out and just dug further since the weight was shifted too much on the passenger side. Lockers tend to "walk" sideways and can get you stuck in a bad way if you aren't careful.