I used a Denali for years, and it was a great headset. However I finally got rid of it after it started generating this awful feedback during a descent. All would be fine while cruising at altitude, as soon as you started descending this screeching would start until you turned the ANR off.
Still I recommend the headset, it was probably my fault as I didn't treat it that well
I have the Zulu now, far superior though....