BB Protect is a good SECONDARY backup. You really should do a full backup at least once a week to make sure you don't lose any important info. Even with GPS on(for locating if lost) there really is no real drain. Turning GPS off to save juice is throwing away half the app. Set it to back up while charging overnight in either 3G or wifi- it only takes a couple of minutes and no battery if its charging.
Oh I do a full backup every week using Desktop Manager of course. I'm just thinking that if I'm away from my PC and I need to restore. Or backup. I like OTA options.