Not too crazy on the shields. I was in a match where some guy had a Riot Shield, Throwing Knife and I think one of his perks was Ninja Pro, and I'm pretty sure he had Cold Blooded on too. The guy had over 50 kills and maybe 10 deaths, he even got the last kill on the Kill Cam, he bludgeoned a guy to death with the shield.
Only way I know on how to kill these guys is TRY to get around him and stab him or shot in the back, or using frag grenades.
Other than that, they are pretty unstoppable. It's like the new Juggernaut. Anyone else not too happy with this?