Installation: 8/10
A CD was not, but the installation was very simple: google drive, install (for safety's sake Restart PC), plug the headset - ready. Important: You can the headset using the hardware switch to switch between 7.1 and stereo mode. The switch is located behind the left ear. I initially did not know that it exists. Unsightly side effect: Lets you run a game in 5.1 mode, while the headphones are set to stereo, some sounds come only from the right speaker.
Comfort: 8/10
The headphones fit well and seal properly, noises from outside are hard perceptible. My ears are well enclosed and are not pressed. Even the above bracket does not press. The need for adaptive length metal bracket might be a little easier and adjustable snap better than at Sennheiser. Currently they often slip back and forth. However, it did not bother if you have them once placed.
The comfort was very important for me, my old headphones (Sennheiser PC 151) have very laterally compressed after a while.
Sound: 9/10
I have the headset bought mainly in order CSGO or other shooter / computer games to play. Game is the sound very well. Opponents can easily be located. I was skeptical at first, how to simulate a 7.1 system with only 2 physical speakers, but the result is convincing. CSGO supports a maximum of 5.1, but it is enough perfectly and wonderfully adapted by the 7.1 headphones. At first I found the sound (especially when listening to music) a bit tinny and too dominant in the heights. The driver creates equalizer via Remedy.
Crackling or noise I have not (I put the headset in one of the rear USB ports of my PC - possibly a crucial detail).
Microphone: 6-8 / 10
The microphone I tested only briefly. Works seamlessly and seems automatically as soon as you it folds upwards. Recording quality is pretty good. Nothing earth-shattering, but still sufficient and good. For an accurate assessment of my expertise is lacking.
Processing: 10/10
Until now! I have read a lot of "breaking points", so far with me, nothing is broken. The cable is pretty thick and makes a stable impression. I almost wish it were a bit more flexible and less rigid.
Conclusion: As long as the material is not tired - strong buy recommendation! Pay here reimburse message when something breaks.