Summary: I really like this item. They're comfortable and are easy to store. The only problem that I have is that they have two volumes: loud and soft. I'll turn my main volume to 1 and even the websites (or for whatever purpose that I'm using them) volume to really, really low. Great product.
Summary: The headset is comfortable, it doesn't feel heavy, and the cups don't press against my ears. The cups are adjustable up and down, and the microphone boom swivels up out of the way. I wish it would go another notch lower, but it seems to be all right in the lowest position. The headphones fold up flat so they're easier to stow in a suitcase or drawer. I didn't have a bit of trouble using this headset.
Summary: Big difference between these headphones and the Heil traveler dual. I'm using the Koss headset for the 10m contest, using the Kenwood 480 with CW filters and with the Heil I had the sound between 12 and 1, switched to the Koss and dropped it down to 9 and I was able to hear stations that I couldn't with the Heil. On voice I get reports of a hum on my audio with the Heil but when I switch to the stock hand mic it goes away.
Summary: I bought this for my HF rig. The Microphone is a ELECTRET and needs a supply voltage for operation. It works great with my 746pro Xcvr. The reason for Good instead of Great is that the headphones squeeze my head. I will see if there is an adjustment [bending ?]. I get great audio reports using the TX EQ suggested by Heil.
Summary: They're pretty nice, I guess. I use them in my university German lab. I mean, I didn't get much chance to test them, but they sure make people shouting things I don't understand sound nice. They also seem like they've been around for forever, so I guess they're probably pretty durable.