From the reviews you provide, I can deduce some points.

Pros:

• ROCCAT VULCAN is equipped with the function "Aimo Illumination" which makes it a mainstay gaming keyboard. Actually, this kind of LED lighting feature is not very important to me (only visualization problem), but for some gamers who want to look high class, the "16.8M color with various special effects" feature gives the impression of "expensive" on the keyboard.
• Full convenience. Properly reinforced design is able to provide a comfortable armrest. Why is this necessary? - for gamers with high intensity playing time, with no comfort on their hands, fatigue will come fast.
• Full customization. ROCCAT VULCAN gives you full power, whether in keymapping configuration, lighting, up to speed response button.

Cons:
Too many different functions and benefits make it a bit confusing to the user at first, though eventually they will understand it well.