What in-game benefits do we get while the accounts we play are linked?

1. Characters on both accounts can summon each other once per hour.
2. While adventuring with your linked friend/family member, you will each gain triple experience and honor.
3. For every two levels the new player earns, the new player can grant one free level-up to a lower-level character played by the veteran player.
The levels need to be earned in order to be able to grant a free level-up. Any leveling done via gifted levels does not earn you any free levels to grant.