Supposedly, they are on the right track now. The MaxxFarce was a disaster though.
Don't get me wrong, you can run a RigDig, and check the ECM history on the engine, and you might get a good one at a very low price. The price they are selling these things are are crazy low, might be worth the risk. Just gotta do as much research as possible on the truck and then decide if you want to roll the dice.