I bought the Jawbone UP early June and it broke down in late August. Symptoms: low battery and the inability to resynchronize with the smartphone. The LEDs light up, attempt to soft reboot, hard reboot .... nothing works. In exchange therefore. Or a full refund and wait Jawbone so the new model. This comment does not therefore relate to office, we know what we buy, and there is already enough great reviews on the internet. As usual with the VAS 2 years Amazon and quality of service, there is no risk ....