A disadvantage according to use: the length of its cable. Yes, 3 meters, it is a bit exaggerated to connect it to a computer. It comes quickly to use an elastic not the wire lying on the floor. For if an office chair with wheels pass by, station to breakage!
A slightly shorter but stronger cable would have been appreciated.
So we come to the main flaw cable sorely lacking in robustness. In this, including mini jack connectors and connections to the volume / mic control.
In normal usage, the two bought helmets ceased to function because of the fragility of the cable.
This is clearly the weak point of the helmet, which force you to replace it after a few years of use only within a very great delicacy.
We could extend the life of these two helmets resoldering cable. The problem was often located at the volume control, the cable there is very little protection against pull-outs - maybe an idea for helmets tests, checking their strength over time and not just their audio quality?
Since the microphone is highly directional and very short range, it was hard to get good sound for Skype telephony. Ultimately, it is the webcam that served - and still serves - microphone, with the advantage of not having to wear helmets and talk to many.
The next will be a microphone headset without helmet, which hopefully will find a sturdy helmet to all points of view.