I've tried it a few times, only for it to get stuck at trying to disable Knox.
--- Samsung Galaxy S4 Android 4.3 Root --- --- Based on the CVE-2013-6282 exploit by cubeundcube --- [*] Testing adb usability Plug in your phone and Press any key to continue . . . [*] Waiting for your phone to appear[*] Your phone is detected and ready for rooting. [*] Sending files to your device... [*] Starting rooting program. ro.build.product=t03g ro.build.id=JSS15J search kallsyms... 1 (kallsyms_addresses=c082efb0) (kallsyms_num_syms=0000ef10) kernel dump... 1 2 3 4 5 6 7 8 9 prepare_kernel_cred=c00c04c4 commit_creds=c00bfcb0 ptmx_fops=c0bda36c ptmx_open=c02bb450 tty_init_dev=c02b3ff0 tty_release=c02b3a4c tty_fasync=c02b117c ptm_driver=00000000 Succeeded in getroot! Remount success! Copying files.. Done.. reboot to enable root! (I don't actually need to reboot here, it just goes on to the next step) [*] Checking if rooting succeeded [*] Removing temporary files... [*] Trying to disable Knox...
 The additional text which shows after a reboot. Obviously I was unable to actually start SuperSU to update it.
[*] Checking if rooting succeeded[*] Removing temporary files... [*] Trying to disable Knox... [*] Rebooting... Please wait.[*] Waiting for device to re-appear... Wait until your phone reboots,then unlock it and Press any key to continue . . . On your phone, open SuperSU and let it update if it asks. When SuperSU is done updating, Press any key to continue . . . On your phone, watch for the SuperSU permission popup and give permission for ADB Shell to gain root permissions.
Just to note, Knox is tripped every time saferoot tries to disable it.