Along with its conclusion in the Answer arcs, one of the best stories I experienced with wonderful characters and amazing music. Do yourselves a favor and play/read this one. Nothing will compare afterwards, especially in the genre. The whole journey is sad and triumphant at the same time. You will be cast into the lowest hells of depression and raised up to highest peaks of happiness. Simply sit back and enjoy the story. And if that is not enough, use your reasoning to try to look behind the veil. Welcome to Rokkenjima.

Pro-tip: Voice and graphics patch ripped from PS3 version adds greatly to the experience. Especially the voice patch. All of the voice actors clearly put their souls into their work.

Bioware's eulogy, its all ogre from here.