Rooting questions from a rookie

view story

http://androidforums.com – Firstly I have an s3 running JB with Rogers here in Ontario. Ive been thinking about rooting my phone mainly because I want a better battery life and connect a ps3 controller with my phone for the GTA app. I honestly know nothing about rooting or what this process even means completely but I have some questions: 1) Will rooting change the layout of my phone right away? Reason I ask is because I have customized my pages with apps, widgets to my liking. 2) Is it possible to un-root my phone? 3) what should I know about rooting before I decide to do it? 4) Is my s3 considered an interna (General)