I bought these to try out the capacity of Bluetooth headsets. My main use is to listen to music but I don't call that much. However, people seemed to not be hearing me well when I used the microphone on the headset on the phone. Soundwise, I have no complaints and I always trust Sony to provide the best sound quality, with defined sound for a good price! The battery life is far good for me, providing I listen to music all day : I charge it at night and it's good to go in the morning. I would complain about one thing though : the headset is a little heavy, and the battery seems misplaced on the headset. Also, the earbuds don't attach to each other so they could fall off of my neck easily when I'm not listening.

I have the WI-1000X but sometimes I prefer to wear a more simple design and when Sony released these I thought I’d have to try them. The side with the remote is actually thicker cable than the plain side and to me, it’s totally solved the regular industry issues of remote side slipping. They are super light and really comfortable!! Sound decent, a very good simple bluefin ear!!!

The build quality and features are good. However, the audio lacks bass and the design is flawed as the component that is supposed to rest on the back of one’s neck (ie between the shoulders) slides around and has to be constantly repositioned.