I've installed hundreds of them over the years without any issues. What I really like about them is if you lose an air line or have a cable issue, you can simply install the included plunger in the diff cover to lock the axle while you're still wheeling. Remove for the drive home.
On the other hand, the air fittings or cable will be somewhat succeptable to trail damage since the air fittings come out of the diff cover instead of out of the top of the housing like an ARB.
On the other, other hand, they are easier for the amateur to install than an ARB. Since there isn't a seal housing and associated shims to deal with like an ARB, you don't need a housing spreader to install one.