I really like how this song was written. As you said in your description, the vocals are incredible and I find the arrangement to sound really good. The song has a sort of haunting sound that makes me think of Evanescence having a baby with dubstep. There's lots of emotion and passion in this song and I particularly like the part at 2:03.
The fact that the song just kind-of starts is a bit strange. I understand what's supposed to be happening but it feels a little to abrupt. I think a simple uplifter or lead-in note before the beginning of the song would smooth that out. Also, sometimes the vocals seem to be fighting to be heard against the instruments during the refrain. Sometimes its ok, it's just that other times they compete.
Overall I really enjoyed it.