Default [Q] Root and Unroot Galaxy Note 2

Hello,

I want to root my Smartphone and later unrooting to recover the warranty.

I have a S.Galaxy Note 2 N7100

I have read several methods here:
http://forum.xda-developers.com/show....php?t=1896696
but
I am not sure about the better method to use in order
to make a quick and safe root and unroot.

I think that the best choice is to root by Kingo Android Root program
http://forum.xda-developers.com/show....php?t=2680664 ,
and later
unroot flashing by Mobile Odin android app
http://forum.xda-developers.com/show....php?t=1347899.
(since Kingo unroot does not recover completaly warranty status)

Or to use the app ExynosAbuse without use Odin,
http://forum.xda-developers.com/show....php?t=2050297

I have also read other ways as
to use the program Galaxy Note2 Toolkit.
http://forum.xda-developers.com/show....php?t=1923956

I don't know what is the better choice
maybe root by Kingo and unroot by Mobile Odin,but I am not sure at all
and I am afraid to brick my device.


Please,somebody can tell me what is the easiest,safe and quick way to root & unroot my smartphone?

Thanks a lot,
I hope a reply.