"Blurring the lines between music and artistic performance, John's use of visuals and costumes [pushes] the set to another level... An incredible performer, and certainly unique." (Paper Champion)

 "The closest thing to a living cartoon character. Makes music like no-one else in this dimension." (Professor Elemental)

 "Callaghan [inhabits] a strange zone... comfortable in the IDM scene, making melodic electronica, yet almost always vocally-based, with eccentric lyrics and usually silly and brilliant videos. That strange dualism of electronica and songwriting sits alongside this other dualism of the beautiful and moving against the very English sense of the irreverent and ridiculous." (Peter Hollo)

 "All you could desire from a gig. One of the most inspirational music acts we have ever experienced." ★★★★★ (Todolist)

 "If you want to put your brain in the blender, have a listen - it's [as] if Aphex Twin wrote British music hall songs... In a good way" (Tomás Ford)

 "Peak Fringe." (Joe Black)