I think it's very strong song. At first I wasn't too impressed by it, but after the second listening I thought it's really crushing. My favourite parts are Fredrik's solo and his seconf acoustics after the HEAVY break. By the way, this HEAVY break after the first acoustics is pretty similar to "Demon of the Fall" middle-part.
I was surprised by no clean vocals during the entire song and by that thrashy 6th string tremolos. There was never something like that before in Opeth's music. And it's pretty pummeling, I think.