Amazing
I really enjoyed every single part of this song. The guitar was amazing, the vocals were amazing, and the overall sound of the song was awesome. This song was masterfully done.
I would love to listen to a version with drums, although I think the drums shouldn't come in until a build leading into the section starting at 3:53
I also would enjoy hearing a greater difference in volume from the soft parts to the loud, but I also realize that recordings don't always reflect dynamics very well.
And I don't think it sounds that much like the song by Alter Bridge mentioned. Certainly there are some similarities, but the songs overall sound nothing alike.