RAF eveyone calls it = when he/she gets it and your both in party together you get 3x exp you would normaly and if he/she like the game and buys 1month you get a 1month free and if they buy 2months you get the rare 2person flying mount.

You actually need to purchase (2) months of game time in order for any RaF benefits to kick in. You can receive plenty of epic mounts and companions, aswell as the 300%xp boost if you are within (5) levels of your partner. Also another feature if you hit level 85 on two characters, you can also give your friend a free level 85 its along the line of the (Give Levels) option in the social menu after RaF has taken effect.