I dont really care about prem/bucks or all that..
But Im telling you guys this works - I had just discovered it at lvl 80 some when I was grinding out feral wookies, and it boosted my xp gain uber for the time I was spending by about 2 times.
There is no pet grind, and hence this is an excellent way to just kick back and hit a few buttons to get fast xp in areas that would have been either impossible to grind out of aggravatingly difficult..
If one really wanted the loot, they could even pop in a loot macro while staying in combat too.
Im thinking of starting a new toon, and believe me, I'll be using this
Just dont ask me in game how im standing there taking no damage from 4 enemy npc's at the front of a base from the legacy quests- I might tell you I have some uber armor with a special heal attachment or something

lol