Well, I used to work for 4wpw. SOld them all, never had an OX returned to me, or ever had any repeat customers come in for misc parts like ARB parts.
I sold the misc ARB parts all the time because they always seem to fail. Plus if your air source fails, you dont have a locked.
The OX is nie because it is 100% mechanical. If you happened to rip out the cable or break it or whtever, you can always crawl underneath the truck and push/pull the cable with a pair of pliers to engage or disengage it.
That in and of itself may pay for its weight in gold if you break in the middle of no where. Plus the included high strength diff cover is an added bonus if you dont already have one.
I like the simple method, no electricity, no air, just metal.
This is however, just my opinion, backed with a little experience. ARB lockers are good lockers if you dont mind dealing with all the little headaches that come along.