I got this pair of Logitech g633 Artemis Spectrum in exchange of a pair of Razer Blackshark (wasn't satisfied with the general sound and comfort AFAIK).
At first, I was not comfortable in them, so I thought of changing the ear pads with the ones that I had with this Logitech g430 headset:
I thought the ear pads would never fit, but surprise! They did fit! At first, I felt more comfortable but since the other pads had fabric filters and these ones did not, I felt the speakers on my ears and I thought of putting soft fabric in the inside of both cavities in order to cover those pesky speakers, but, turned out that I didn't need to that, because I got used to it as time went on. So yeah, i'm pretty satisfied with those slighty modded headphones.
The actual headset is good, and does the job with it's good sound and not that bad of a mic that surely tops the mic I had on that G430. The G430 still had better comfort though, but I'm getting used to the G633.