So after flying with various ANR & PNR headsets for the past six years, I decided it was time to get an ANR headset of my own, so I bought a pair of Sierra’s. So far, I’ve only put about 2hrs on them, but enough for a short PIREP. First impression was overall comfort. They do seem a tad bit heavier than the Zulu 2’s (I have not used the Zulu 3’s) which is a bit surprising since the Sierra’s are mostly hard plastic, but it’s a high quality plastic and feels well put together. Even without the ANR turned on, they have really good passive reduction, so if the batteries went tits up during a flight, you’ll still have ample noise reduction. I’ve used the Bose X, A20’s and Zulu 2’s and while not side by side, I can’t detect any difference between the Sierra or the Zulu 2. A lot of people say the A20’s have better ANR than the X but I don’t think they do, I can’t tell a difference, same goes for these in comparison to the Zulu 2’s. My only complaint, and it’s a small one, is the headband is a bit larger, as it protrudes outward, farther than the Zulu or A20’s do, which is one thing I like better about them being a bit more streamlined. Overall, if you’re looking for a new headset but don’t want to drop a grand on a pair of Zulu 3’s or A20’s, go with the Sierra. Anybody here fly with the DC One-X? That’s one I haven’t tried yet either and would be curious on PIREPs from those who have them.