I tried it, its very good. you get 1-3 ultra vandals, dregs, or shanks every other spawn. Didn't get any Legendaries but a mountain of blue and green. Also got tons of glimmer due to the ultras. You don't have to wait long. If you watch the vid. (Edited this bit)the trick is to jump in place once or twice and then they spawn. This is necessary as the game believes there are no Guardians on the map in that vicinity, once the jump has you leave the map. The only thing that was frustrating was the public events, even when other folks jumped in to help, we never got full 3 star credit. the Public events rotate pretty frequently. if grind the loot cave for 40min to an hr. your gonna get all 3 public events...