So I know this information is probably available somewhere out there, but if you don't feel like looking for here is what I have from doing it today.
-You get a full set of 483 green gear.
-You get 4 x 22 slot bags.
-You get 150g.
-You login at the flight master on the Timeless Isle.
-You get all mount training except Master Riding (310%) and Cloud Serpent Riding.
-Your Hearth gets set to The Golden Lantern, but you only get the flight points from the Golden Lantern to the Timeless Isle.
-You DON'T get any additional glyphs.
-You DON'T get dual talent specialization.