Compared to a Detroit truetrac? Absolutely yes, I'm with Johnny on that one.
Compared to a regular Detroit full-case locker? Well, that's what I have in the rear of my rig, love it, never hear a damn thing from it, its bulletproof and just works.
The truetrac is a different type of locker than the regular Detroit one, its more like a Limited Slip than a true locker, which is why a lunchbox locker (like the lokka) would be better for off-roading than a truetrac, whereas a rig that sees a lot of pavement as a daily driver might be better off with a truetrac.