Saves time - everything goes much quicker and much smoother. Speeds up some jobs like spacing trusses, eliminates others altogether like not needing to remove temporary bracing before sheathing.
Saves Labor - less time setting & bracing trusses translates to lower costs. Eliminating lumber cutting, hoisting, and handling for temporary bracing means additional labor savings. And because there is no lumber-bracing tear down, there's no labor time spent removing bracing, de-nailing, and re-stacking.
Saves lumber - Little (if any) is needed for temporary bracing.
Saves crane time - Adds up quick at $100 - $200 per hour.