Sound quality is great. Baterry for at least 6 hours of music and calls, which means two days of three commutes to me. Charges up really fast, even in a USB port, in a couple hours you will have it working for you again. It takes a long time to respond a command, and the screen is slow. Sometimes... Sound quality is great. Baterry for at least 6 hours of music and calls, which means two days of three commutes to me. Charges up really fast, even in a USB port, in a couple hours you will have it working for you again. It takes a long time to respond a command, and the screen is slow. Sometimes you can see some annoying flashes when looking the screen in the dark, because the screen scans like an old tv, one line at a time. If you can't get great sound quality, it's probably because your device is running android 4.x which has a bug in bluetooth connection. Update to 4.4.x and it will sound a lot better. Earlier (2.x) versions doesn't have problems. If you have a tablet that make calls and doesn't want to hold it to your ear, you should buy it. If it's not available, wait until DX restocks. It's worth. Read more