Comfort
My ears are pretty average and fit perfectly well inside the ear cups with space to spare and the memory foam is very comfortable on the ears and head. The Vulcan has a perfect cuddle strength, in fact I was pleasantly surprised as at first it seemed that it may slip or fall off for not squeezing hard enough, but it turns out that the memory foam really does the trick and it stays on perfectly without being a vice grip. Over time my head never really started to heat up nor did my ears get sweaty which is always vital, though in fairness we are now in winter.

Durability
Overall the materials seem like they were well thought out and made to last, but there are a few things that seemed to have let slip. Primarily, the ANC switch, turning the switch on seemed to move it too far so that the switch felt like it went too far/ may eventually fall out. On trying to move the switch back, it cut out audio in one ear. Turning ANC off and on again solved the problem but seemed like a repeatable issue. On top of this, I also noticed that with ANC switched on, if I was to knock or tap the headset, the audio would cut out for a fraction of a second, again this was repeatable and these issues could lead to some frustration.

Active Noise Cancelling
ANC is a method to reduce ambient/background noise by feeding the ear with 'anti-noise' which effectively cancels out frequencies from outside the headset. Simply put, the headset fires white noise (hiss) to cut out noises around you. ANC needs a power source and it is a shame that the Vulcan headset is not USB powered instead of battery, though the ROG R&D team may have their reasons for this. On switching on the ANC, a dip in bass reproduction is immediately noticeable and it suddenly seemed like I was sat by the sea-side. At higher volumes the hiss isn't too much of an issue, however, having tried to make up the bass in the equaliser, it can 'sound better' but does NOT sound the same as with ANC switched off, the difference is between sand and cream. To say that the ANC works is a little bit of an understatement, combined with a well enclosed ear cup that lets little sound sneak in anyway, it was difficult to hear myself talk on the mic which resulted in me speaking very loud to friends on DOTA 2. With ANC on and no other sound playing, I could barely hear my GPU fan at 100%, could barely hear myself typing and people talking to me in a normal manner sounded like they were speaking to me from the toilet.



Music
I setup the Vulcan ANC by plugging it into a dedicated headphone amp on a discrete sound card. I understand that not everyone will have this setup though it is one I would recommend. After careful consideration I decided that I absolutely prefer listening to music with the ANC off. Listening to Aesthetic Perfection - Inhuman was excellent, the synths were sharp, bass was powerful and vocals were clear. Pushing the volume to max resulted in perfect audio with no distortion, except in my eyes as the vibrations pelted my brain. Cracking up the headphone amp by +10dB to my surprise the sound was loud, distortion free and was awesome, I never tried the headphone amp on max for fear of damaging my hearing.

Listening to Sabrepulse's Terra and Titan EP proved to be an impressive experience as the mash up of contemporary experimental music stretched the headsets capabilities by throwing a Swiss Army knife of instruments backed by electronic drum and bass tones, the Vulcan ANC delivered clear and precise audio in the mid range and produced some impressive bass.

Games
Battlefield 3 was immersive, chaotic and intense. Noticed some differences in sound with and without ANC, when turned on, there was ironically, a bassier punch to gunfire and explosions but jumping/footsteps and ricochets seemed quiet and muffled which is not great for multiplayer when people are sneaking around. When turned off, guns had a more balanced 'CACK' followed by echo, and footsteps were clearer.

In DOTA 2 the announcer was GODLIKE and the hero responses had more depth to them as I was able to pick out more subtle tones in the voices.

Microphone/Conversation
On the 'katana' mic, the receiver is mounted on the opposite side than 'normal' which serves as a way to cut out breathing noises. On SKYPE I was told that my voice sounded the same as usual, which suggests that the mic isn't much better than my webcam built-in microphone, however, I was told that background noises were almost non existent which means the microphone does a good job of blocking background noise. This would suggest that the microphone does what it meant to do, give clear voice and doesn't pick up on unwanted background noises.