My first ones broke on the left side after 3 months of winter running with a little drizzle. They replaced them because they couldn't be repaired. My second ones broke on the right side again with a little sweat! As an idea, they are good but they are only suitable for walking or for those who don't sweat. They don't have an adjustment feature, the sound is good but low, they have an issue with the case, they don't fit well and sometimes they don't charge. They require attention... they should give them to another company because as an idea they are good, but in implementation, they fall short and for this price, it's regrettable! P.S. For those who have poor contact with charging, they can put a little foam with double-sided adhesive on the lid of the case to keep them pressed

So I have had these headphones for eight months now. At first, they were a bit uncomfortable after several minutes of use because they were putting pressure on my ears and causing pain. Now they have become more comfortable. However, they have started having some problems.
Firstly, when I have them in the case, they don't close and they connect to Bluetooth out of nowhere, and I wonder what happened to the sound.
Secondly, when I listen to music while sitting still, they disconnect and then reconnect after a few seconds. Quite annoying.
Thirdly, although the fit in the ears has become more tolerable, when I use them during workouts, like light running, they tend to come off. I almost lost them several times.
Fourthly, I would like a bit more volume. They lack in that aspect.
Let me mention a positive aspect though.
The battery lasts quite a long time, even when I forget to charge them.
They do withstand sweat and I have no issues with that.
The discomfort that other earbuds cause when inserted into the ear is not present, and I can actually hear sounds from my surroundings, like traffic noise, when someone is talking to me. Actually, that was the reason I bought them. I hope I helped.

Very good, lightweight, very good sound quality. The only downside for me, which is also essential, is that it does not connect simultaneously to 2 devices, a laptop and a mobile phone, making it useless for me. I will see if my son wants it. Whoever is looking for headphones for one device should get them.