I'm not sure if you guys have been paying attention to KC games but their defense is vastly improved.
It's basically the Patriots scheme with Romeo Crennel at DC. And they have a nice group of playmakers with Glenn Dorsey, Tyson Jackson, Mike Vrabel, Derrick Johnson, T Hali, Brandon Flowers, and Eric Berry.
It's going to be very interesting how they match-up with the Niners.
I refuse to be overly-confident that the Niners can just go into Arrowhead for an easy win.