First of all, I previously purchased this product through Coolblue, and Steelseries gave me a completely free replacement after reading my review. Fantastic. I was contacted by a Coolblue representative, who arranged it for me. I've never experienced anything like it. I was truly speechless. I have nothing but praise for Coolblue and Steelseries regarding their service.
But then. The product itself. Even with the new product, I have the same complaint: a high-pitched buzzing noise in the right earcup. However, this only occurs when I use the product wirelessly for a while. Once the battery reaches 70%-50%, the buzzing gradually returns and becomes increasingly louder.
When I connect the product to my PC via USB-C, the sound disappears. Possibly the battery?
Other than that, fantastic design, great sound, extremely comfortable. Definitely recommended. If you mainly use the headset wired, it's a great experience. The only downside is the microphone. It's bizarrely poor quality. Luckily, I don't have a problem with that myself, because I only use it for sidetone. I have a separate microphone for my input needs.
So keep that in mind.