The obvious question that comes up with bouncing flash behind you, is that they do tend to fire at full power or close to full power. If you shoot events, where you need to take repeated shots with your on-camera flash, they do take a beating and even risk even burning out. I do hammer my speedlights, especially when I use the Quantum 2x2 battery packs. This doesn't bother me greatly, since I regard my speedlights in a way, as consumable items. They will become unrepairable at some point. Cost of doing business as an event Read more inside...