The quality of sound and microphone corresponds to the cost of the headset. Overall, not bad, but not sennheiser either. In general, if they last a couple of years, then it’s quite a suitable headset. Regarding plastic - I saw a couple of reviews that the plastic is bad and breaks. I have been using them for a couple of months so far, once I accidentally sat on them. The plastic held up. Huh, maybe I'm just lucky