What are your main reasons for wanting to root the Note 2? I wouldn't get it rooted unless you have a specific reason for doing so.
By rooting the phone you are gaining superuser permission. This will allow you to uninstall bloatware, make various performance tweaks, use app features that require root, install apps that require root, and flash custom ROMs.
The negative side of rooting is that you can brick your phone if the proper rooting process is not followed. You can also seriously screw up a phone by flashing the wrong ROM.