They were bought a year ago for 50 euros and were preferred due to Razer's reputation as a safe choice. The sound is very mediocre and the bass is non-existent in my opinion. After 5 to 6 months of use, the sound adjustment wheel cuts off and reduces the sound from one earphone when it reaches the maximum level. You have to find a point before the max where both earphones can be heard at the same volume.
As for the microphone, during calls, if I, for example, watch a video or listen to music at a moderate volume, for some reason, others on the call can hear it. It's not the sensitivity of the microphone, it's the microphone itself.
After a year, they broke on the left side below the cushion, and from what I see and from other comments, it's a common issue with these headphones.
In short, at the current price of 30 euros, I don't believe they are worth it, as there are other non-branded headphones with better performance.
The moral lesson is that just because it's a brand doesn't mean it's good.