Typically they work fine, but there are couple annoyances that make no sense so far.
Battery notification sometimes: 6-12hours of playtime remaining - ok, but should I really be informed about that if there's still power for 6h more hours?
The sound tends to randomly drop and then for a while it doesn't want to reappear. For example, connected to laptop - listening just fine, then audio drops. Connect to the another option, the hands free option with mic, can listen again, just with the annoyance of the microphone, but changing back to default mode, there's again no sound. That goes on for half an hour at least. Turning off and on again or reconnecting doesn't seem to fix that.
Headphones are not for headbanging or leaning forward - they are not snug enough, so they can be easily thrown off of head. Or maybe they're just made for big lumberjack heads. :D
Though they are comfy - they fit over the ear instead of sitting on top of the ear, so they can be very comfortably worn for a whole day.
In conclusion, they are comfy and sound good, when they decide to give out sound. :D
I would wish that they had the option to connect with jack too. But oh well.