My Nanovision only works in like 1 out of 20 games. Most the time I only see my arm and fires, but friends and enemies seem to be zombies and they don't show up. But in killcams I can see others using Nanovision, so it's not a modified server either.
Also my perks, for example Threat Detection show the same effect. Not working for me in 90% of the games but in the Killcam I can see the bullets.
Everything worked fine when I played the demo, so this is no hardware incompatibility.