Well, as the owner of the former Razer Kraken 7.1 Chroma v1, having tried the v2 as well, I have the following to say.
The construction is of very high quality, and I was relieved to find out that the microphone in the picture is not made of plastic, but rather silicone and flexible. It comes with a USB cable, a USB stick, and a cushion for the microphone.
The construction is solid, beautiful, and very comfortable. Unlike the Razer ones, I can hear myself speaking, which helps me gauge my volume. At the same time, they do a great job of isolating sound.
As a woman with a small head who wears glasses, I find them to be very comfortable and I didn't need to adjust them. They are a bit big for my head, but that's not a problem. In fact, they are quite comfortable. I believe that someone with a larger head and glasses shouldn't have an issue either. However, you will need to download the software and read the manual, as it was very helpful for me.
I have the white ones and that silver detail is made of steel. The cushions are very comfortable. Overall, they feel more relaxed on my head compared to the Razer ones I had and tried.
They also have a button on the side for muting, on/off, and a volume wheel.
Unfortunately, I couldn't download the software from the Corsair website due to a small issue. I hope they fix it in a future update. So far, everything is good and there is no interference!
Edit1:
Actually, there was an issue with the link in the manual. Just go to the Corsair website>downloads and download the corresponding iCUE software. The bass is amazing, with no distortion. The sound is crystal clear, and the vibration it creates with the bass is simply dreamy.
Don't be alarmed if you hear a female voice when you download the software. Go to settings and unselect "Enable Voice Prompts" to play with the equalizer, create different layers and profiles, and adjust the settings. It's much more convenient than the Razer software. Enjoy!
edit2:
Actually, the microphone is bendable and made of silicone. It's soft and somewhat velvety, and when you lift it up, it mutes automatically. I also noticed something with the bass. The left earphone slightly creaks in songs with a lot of bass (e.g. Troyboi-Do you) if the volume is above 60. However, with other songs so far, and at maximum volume, there is no creaking. If you're looking for headphones to listen to songs with a lot of bass, these might not be suitable for you. I hope this helps!
edit no3 15/2/2021: I saw someone complaining about the signal range of 3-4 meters, but I have to say that I have used them in different rooms with closed doors, and I had absolutely no problem with the signal. So far, they work well. The only minor issue is that the microphone doesn't stay in an upright position, but personally, it doesn't bother me.
Edit no4 19/09/2023:
In the past year, my headphones started doing something strange. When I was charging them on my computer and playing at the same time, many times they would 'shut off' when the plug of the cable that goes into the headphones was pressed against my shoulder. And yesterday is when they completely stopped working and won't turn on. And sometimes, without me touching them, the volume would go to the maximum with a lot of distortion. Now, how and why, I have absolutely no idea. For the 120€ that I bought them for, I don't know if they were really worth it, considering they lasted for 3 years. And the battery life has decreased, but that's understandable with daily use. Maybe it's my fault for pressing the plug of the cable against the headphone jack with my shoulder. To prevent this from happening to you, make sure to charge them every night with an external charger. That's all from me about these headphones, happy shopping!