The EZ-locker and Lock-Right are nearly identical. No difference worth mentioning- they are functionally identical. The Aussie and Quik-lock are also basically the same. The Aussie doesn't have any pins to break though, which sounds like a good idea.

Baldy- your EZ-locker simply wasn't set up right. Likely what happened is the distance between the couplers was greater than allowable spec, and that is kind of how it will act when that happens. You might have been missing a thrust washer or the carrier might have been worn. The instructions should have included those specs to check after installing it, and showed you how to test the locker. My Lock-Right did anyway.

I've been running a Lock-Right in my 44 for 5-6 years and its held up great. I broke the pins on it once beating on it really hard, but that was only a $10 fix. When they broke, all it did was lock up solid like a spool. Its not noticable in 2wd w/ the hubs locked and never acts strange in 4wd either, even in snow, etc. Very good bang for the buck! I've always meant to upgrade to an ARB when I had the money, but its hard to justify the extra cost when this one works fine.

I put an EZ-locker in the front of my brother in law's '87 IFS 4runner and he didn't have any problems with that one either before he sold the rig.