[1] Jim Carroll of The Irish Times commented "Listening to Callus, though, it’s clear that Ecks has done some hard living in the last few years and the songs are attempts at catharsis as he deals with events across both his homeland and his own personal universe.

It’s dark, dissonant, raw and desolate, a collection of tracks which are often on the edge of collapse as Ecks pulls at the various threads holding them together.

"[10] Andrew Ryce of Resident Advisor stated "Callus was made over the course four years, through frustration and hopelessness.

The clarity of the songwriting varies wildly across its 19 tracks, though the sound quality doesn't, always rendered with the lo-fi fuzz of a busted mic and a TASCAM four-track.

"[4] John Paul of PopMatters added "With Callus, Gonjasufi has crafted an aural equivalent of this modern era.