I don't think anyone said anything about difficult/dangerous?

Basically an auto locker just has some quirks that you get used to. I haven't used one on the street, so I don't have any personal experience. Basically from what I understand, in tight corners if you give it gas it will lock up and scrub a tire or sometimes buck or bang. So from what I've heard, you learn to try to mostly coast through corners. I'm sure some of the others here can give a better description.

The nice thing about the auto locker is that its on all the time and doesn't necessarily lock up or scrub a tire unless you're on the gas. With the ARB you are a full spool or open, nothing in between for street traction when you need it (although I'll turn it on if I think I'm going to peel out of a corner or something <img src="/forums/images/graemlins/smile.gif" alt="" />). That's one reason I like the LSD's for the street.

The other thing about an LSD or locker is that in really slippery or icy situations, the rear end will slip out if you're on the gas because both tires will spin, whereas with the open diff, one tire generally would have spun while the other one stayed put and kept you from moving sideways. I think the traction advantage is worth it though. You just have to modify your driving slightly.

On my 4runner, I locked the front first (LockRight) since in 2wd or when the hubs are unlocked it had no affect on my commuting (at the time), and then later I saved up and put an ARB in the rear. Kind of backwards from what most people do, but I'm happy with it.