I have the Remington 870, and actually prefer the safety on the rear of the trigger guard. As I bring the gun up to shoot, I push the safety with the center of my index finger. As the gun reaches my shoulder, the tip of my index finger reaches the trigger. After shooting, I lower the gun and push the safety back on. I have done it this way so many years that I do it without thinking about it.

I find that a tang safety is not likely to be placed back to the safe position without thinking about it, (at least for me).