I got them to practice on the keys (future piano) with a louder sound without disturbing, and if possible, to isolate the environment a bit so that I don't have to close windows or lower the volume of the TV. In one sentence, satisfied. In more detail:
(+)
- Very good sound quality, clearly fuller than the speakers of the keyboard. Very clear highs and mids, and as much bass as needed for practice purposes.
- Nice and, although it is a simple construction, they seem to have few vulnerable points.
- Very lightweight, sit well on the head, they don't press on me, and the soft materials are comfortable. Obviously, the trade-off is that if you start moving around, they won't stay in place for long like if they were tight.
- Good level of sound isolation - not absolute, but sufficient.
- Huge cable length, around 3 meters, and a good quality adapter with a large jack.
(-)
- For listening to music, for example from a mobile phone that I tried briefly, the bass is somewhat intense in my opinion. I would prefer it to be a click less or cleaner. However, for anyone who gets them for such use and at this price, I don't think they will have any complaints.
- It's not the fault of these specific headphones, it's this category of headphones, where after a while you want to take them off to get some air. I just mention it.
- And one last thing that may be insignificant for many, but it made a bad impression on me. The packaging is more... secure than I would like. To take them out and try them, you have to destroy an inner plastic cover that is glued with some kind of adhesive, which I don't consider right.
In conclusion, they fully met my needs for the use I wanted them for, I enjoyed my practice, and I would buy them again.
Edit: using them with an electric piano, which has clearly better electronics and sound quality, these headphones prove to be somewhat... "limited". Their bass stands out more and somewhat covers the mids and highs - with the keyboard, this was a desirable characteristic, but not with the piano. They didn't suddenly become worse headphones, it's just that now I need something cleaner and more balanced. In other words, as the instrument becomes more expensive, the headphones probably need to become more expensive too...