The DC x11 were just not giving any noise reduction at all. I would take the headsets off and the noise level was almost the same, press the ear cups to your head and they worked a little better, but the ANR was virtually non-existent especially for the price. The Bose are obviously the best but they have mic problems for different aircraft and are pricey. The Sennheiser are not cheap but certainly cheaper than most quality headsets but nevertheless work extremely well in all the types I fly from piston to turbine. Also comfort was a big issue although DC x11 were by far the most comfortable headsets out of all the one’s I tried, the Senn’s are very snug and I think better than Bose in that respect and work just as well.