I bought the Digital Quad Muffs with Audio Input. Where I hunt, I can hear the highway droning, so I was very concerned that noise would be amplified even more with the muffs on. I was pretty excited, though, when I found that I could adjust the frequencies so that the road noise is actually diminished in my ears while everything else is still amplified.

As for hearing game, I'm still not certain about it's effectiveness. I've been mostly hunting in the rain so far, and there's just no deer noise to amplify when the ground is wet.

I had heard complaints about chin stubble rubbing against your collar being amplified and deafening you, but that is definitely not a problem with the quad muffs. The 4 microphones are so directional, that any noise that comes out from between your two ears is virtually undetectable. Regarding the directions, the 4 microphones really do let you tell where a sound is coming from, too.

So far, I'd give my muffs a tentative thumbs up. I'm anxious to see how it performs in the crunchy November woods!