I use the Mach 1 in a Cessna 402 and I think it is great. I used to fly with the Sennheiser ANR, and I prefer the Mach 1. My two cents is to spend the $150 and get custom ear molds made. They seal out almost all noise, and it makes the headset even more comfortable. You forget you are wearing a headset at all after a few minutes. Hope that helps.