Good battery life on 5S
5h+ usage, 20h+ standby > low power mode ni siya from 100% - 1%
Performace is Ok, Nice new features too.
Although don't expect serious performance if naka low power mode. Ayaw gamit ana if tig-duwa ka sa iPhone
Proven Safe to Update : RSIM, XSIM & GPP Users (Update, not Restore using iTunes para safe)