Why are these Saints so darn good?

I went with overall defensive play.

Saints would be pretty dang good just based on the offense, but to answer your question as to why we are "so darned good", which I assume means a much level of "goodness", then it's all about the defense.

When I heard we were getting Gregg Williams in the offseason, this is what I envisioned. The offense getting a short field (see Giants game just before the half, criticial turnover caused by the D), and defensive touchdowns (see the Eagles and Jets games with pick 6s that were criticial early on in those games).

It's all about the D, my friends. This is what has clearly escalated an uber talented offensive team into a Super Bowl contending team.