Let me point out that I did not buy them new because the price was prohibitive. So, I bought them used. At first, there was a very strong parasite sound coming from the left earphone, which then decreased and now has disappeared (or sometimes sounds like vinyl scratching). I remind you: used. I paid 130€.
Once they recovered, I saw the light! 60 hours of battery life (actually 57-58, but close enough). Sound quality? EXCELLENT! The ultimate dream, with adjustable EQ tuning through the related application, to perfectly suit your preferences. Seriously, I'm not exaggerating, the sound quality is unprecedented for the average consumer, with warm, rich, and clean bass, while the mid-range and treble are exactly where they should be to provide the music with the detail and liveliness we desire. The sound is as sophisticated as it is accessible to the "uninitiated" (they don't exist, anyone with hearing is enough, but anyway, some people want a certain level of quality).
The Bluetooth connectivity with two devices simultaneously either confused me or the headphones, and I'm experimenting. However, for simple music and calls on a mobile phone, you will have minimal issues, and those can be solved with a restart on the phone and the headphones will work fine for several days. Not a big deal...
Apart from music, we can isolate external sound through ANC, which is not the best on the market (Sony claims that achievement), but it is still quite decent, especially for low frequencies. There is also the opposite, where one can hear their surroundings (through the microphone) - useful in my neighborhood, which lacks sidewalks. One can adjust how much they want to block or accept the outside world, and both extremes are available in the continuous application. As for those around you, you can listen to the music dangerously loud, and they won't even notice it's playing!
The microphones are very good for calls, although for some reason, my voice cuts off occasionally and I have to call again - not a big deal... One particularly good feature is that the microphone transfers the speaker's voice to their ear, so they don't have to shout by mistake - I find that lifesaving.
It fully charges in 2-3 hours. With a 15-minute charge when it's empty, you get 5-6 hours of autonomy if you're in a hurry. Total hours (with all the good features active) are 57-58 hours, as mentioned before.
Bluetooth is excellent: 17-18 meters with two doors and the load-bearing wall in between, on the stairs (and going downstairs to the floor level, Bluetooth doesn't cut off.
Bluetooth decoders range from basic to AAC/aptX Adaptive, allowing for CD-like quality (16-bit/44.1kHz). Your music will be crystal clear.
The construction is sturdy and quite high-quality, although it's made of plastic, it seems durable (mine were already used, but everything looks good).
They put a little pressure on my head, especially with glasses, but let's emphasize that people often mistake me for an African or Asian - definitely not Greek, so I have a big head... My ears don't get tired with all that, despite the glasses. I just feel a slight squeeze because of my head. I have to take them off after 3-4 hours for about a quarter, and then everything is fine. The headband can easily withstand the pressure, and the weight distribution is excellent. They won't fall off your head. Only to a certain extent...
Finally, the right earphone is touch-sensitive, and you have full control over everything with simple gestures. The application contains detailed instructions (and there are probably various pages on the internet). Lifting the right earphone, the music stops until you put it back in its place (it functions correctly). If you take them off and leave them for about 15 minutes, they automatically turn off and come back to life when you pick them up to wear them, saving battery (which already lasts twice as long as comparable Sony products).
All functions can be modified in the application, according to your preferences.
If your budget allows it, get them. I overcame my selfishness, cleaned them with a little alcohol, and I have no regrets!