They have satisfactory sound.
The bass is so-so to bad.
Nice construction, nice design but cheap and it shows, you're afraid it might fall apart.
Personally, they don't fit well in my ears, but the worst part is that they're not meant for long periods of time, after half an hour to an hour, your ears start to hurt.
Also, I don't know if this applies to all Bluetooth headphones, but when I'm using a cable there's no problem, but with Bluetooth, when nothing is playing, there's a noise (like a buzzing) for a few seconds, especially when I'm browsing on YouTube and a video starts playing, along with the playback, it also makes the noise.
Finally, I would like to say that the microphone is terrible during calls, it may be fine, but it loses connection, meaning if I say the word "Playback" during a call or Skype call, the receiver will hear "Pla--ack", when I tried to use a voice recorder, I didn't have the same issue.
As for gaming, don't even mention it... the sound is delayed... then it says BT5, okay.