I'm running the Truetracs in both axles, too. And pretty much concur with everyone's sentiments which range from "they're great" to "they're not lockers and lockers are better".
The Truetracs are more of a balance, a compromise traction device. They provide a lot more traction than open diffs or typical LSDs. Yet they're not as good as lockers in delivering "ultimate traction." However, you don't have a lot of the on-road / reliability / cost compromises that you have with lockers.
So . . . significant traction improvement, good on-road manners, good slick-road handling, no complicated air compressor or air line set up, no finicky e-locker engagement systems, no clicking, ratcheting or chirping noises on road.
Once they're installed, you can pretty much forget about them.
I would say that if you have a dedicated trail rig, or are playing in rocks (or lifting your tires off the ground a lot) then lockers would be a much better choice.
But for general trail running on forest or mountain roads, or going through muddy sections, and so forth the Truetracs are just fine.
Very occasionally I'll encounter a situation that overcomes the Truetracs. . . it doesn't happen often, but every once in a while and about half those times the guys with lockers are having problems, too.
In these situations I bust out my winch and pull me through the 3-5 ft of trail that is causing me problem, then get going on my way again.
Something else I've noticed is that my Jeeps seems to be particularly manouverable. With lockers on the rigs tend to push in turns a bit. Usually it's not a problem but if you're in a tight squeeze and need to turn sharp it can be an issue. If you have selectable lockers you can just turn them off, but with auto lockers there's no such luck. And I'm in an area where I highly value that manouverability with very tight trails threading through closely packed trees.
Bottom line is that it comes down to you, your temperment, and how and where you drive your Jeep.