matthew.ziegler2280914wrote a review of Black Diamond Covert with Avalung Winter Pack - 1343-1953 cu in on May 21, 2009
Loved the pack, it fit well, got the L/XL in the 32L but my complaints were with the avalung:
Lost 1 star because the Avalung was LOUD!!! I sounded like a dying duck when breathing through it. Sales said it is normal for it to sound like that but I just wouldn't feel comfortable in the backcountry with that horrible sound.
Lost 1 star because of the integration into the shoulder strap. The right strap was very comfortable but the left strap where the Avalung came through was uncomfortable.
I ended up returning it and going with the same pack without the Avalung and love it.