The headset is very comfortable. So far 8hrs continuous in CQWW WPX and no issues. Fits over my big lugs comfortably and gives a reasonable amount of sound isolation.
Rx and tx audio are superb with the K3 (flat tx equaliser settings).
The headset can fold up into a very neat ball allowing easier packing for dxpeditions etc.
The lead is very thin and I suspect has not much in the way of a screen, but so far no RF issues with a small ferrite placed half way along the lead (just in case).
The microphone stalk is very flimsy and not very adjustable, but it seems to sit in the right position.
Overall it's a great purchase and makes me a bit embarrassed at spending a comparative fortune on a Heil headset.