 An IGN review described it as "unique and free from boundaries", and it has been labeled as "Isis' masterpiece", as well as their "most compelling work to date".Writing for "Alternative Press", Aaron Burgess states that "save for the brief distorted squalls of "Garden of Light" and the pummeling metallic grooves of "Not In Rivers, But In Drops," there's barely anything keeping Isis tethered to the rigid "post-metal" genre they helped inspire".The sound of the album drew complimentary comparisons to Tool and Godspeed You!