Well, I bought them for 36 euros with shipping, and they ended up being around 43.
Positives:
Very lightweight
Removable microphone and clear sound... very powerful headphones, I would say even more powerful than my Razer Kraken, but they do lose a bit in bass, although they are at a good level.
Bluetooth and connection with 2.4, but also with a type C cable!
All of this at such a low price is simply a great value...
Just be careful, I had an issue at the beginning where I couldn't hear anything until I realized it was the drivers of my graphics card.
They offer a lot for their price and are very comfortable! Now, 35 euros is an impeccable price that you don't really care if they break or suffer something... so far, everything is great... however, you can find such specs in much more expensive ones