I am pleasantly surprised by the battery life, and a complete working day with almost continuous sound did not get the battery limp. They sit with me very pleasant to the ears. Normal in-ear keep me not very good, so this was very important for me. The sound is reasonable. Of course, Sony are no match for my shielded AKG, but that they do not have to. The volume is at least sufficient and the sound is not too thin. Pairing using NFC is also super-simple.
The only thing I could find is that the reception is rare minimally interrupted when the phone is badly buried deep in your pocket, if necessary, you should then make sure that the spark gap is not blocked by too much metal. Here, however, I have no comparison to other devices.
With about 70 not cheap.
