I use 2 years. Everything is great. I will note only some shortcomings, suddenly it will be useful for someone. 1. When you work in them for a long time, your ears get tired, ear cartilage hurts, physical fatigue. At first, it was quite painful to work in them, but over time they developed. Therefore, I would rather recommend DT 990 PRO for long work (they are open). 2. For such a price, the frequency response is good, but it must be taken into account that the bass is slightly overestimated around 100 Hz, the drawdown is at 300-400 Hz, and the high frequencies of 9-10 kHz are slightly overestimated. I recommend using calibration, who needs an honest sound for mixing (although I don’t recommend mixing in my ears) 3. I tried to take them for a walk when you walk in headphones, for every step the sounds of moving elements of these headphones strain For those who have the means, for long-term work in headphones I would recommend the Beyerdynamic DT 1990 PRO (open type. It is easier and easier to work in them. Also with calibration)