In all the ROMS I have installed in the past, wiping data was not necessary and all has been well as I just use Pete's stock rooted ROMS. Well, now I plan to move over to a totally new ROM - GPA15 - and that requires a data and cache wipe. So, this would be the first time I have actually had to wipe data for a ROM install. so, I want to get some things clarified: 1. if you do a backup of your current ROM and install a new ROM & data wipe and then dont like it and revert back to your backed up ROM, is all the data you wiped for the new install saved and back in place in the backup ROM? 2. what exactly does wiping the data do? Does it essentially zero out the phone so all of your settings and saved prefs and apps and tweaks are all.... just gone? 3. how do you best and most quickly get it back to a useful phone - apps, settings, tweaks, preferences, etc - after installing a new ROM without spending hours and hours going through each Setting and installing all of the apps 1 by 1 and then going through their settings and blah blah? It seems an unGodly amount of time potential just to try a ROM. BTW, I have and use MyBackupPRO and TitaniumBU.