Mechanics wise and aesthetically it is the best raid. It fits into the story and lore nicely and has a satisfying conclusion. You have a goal, to kill Oryx, so you go into his dimension, kill his family and minions, and then take on the King himself. The bosses are unique and interesting and loot is frequent. The only complaints are that the weapons are garbage and the armor is ugly. Also, the grind was way too much originally and Bungie really drew out and milked the raid for so long that everyone got sick of it.