This is my first TWS. I have been using it for the last 4 months. Sound quality is superb as name suggests Xtra Bass and brand itself is enough. Battery backup is very good. I haven’t been out of juice in my usage. I usually use 2 or 3 hours daily, specially for music listening. But when it comes calling, I am little bit disappointed. When I talk through this TWS the other one always complain about extra noice. It catches too much surrounding sounds. Sony should have been taken care of this problem. Rest things are excellent. Overall it’s good buy at 8000.??