"Stars in My Pocket" is a reference to a novel by Samuel R. Delany, while "Into This Universe" features a recital of an English translation of a poem by medieval Persian poet Omar Khayyam.

Considine from The Baltimore Sun remarked that while the original rendition of "It's a Fine Day" (by "Jane") "was rambling and dreamlike, a voice-only recording that sounded like snatches of someone's private song", the Opus III version "adds both melodic focus and a booming house beat, a combination that turns the tune into an unexpectedly addictive dance single."

"[6] Marisa Fox from Entertainment Weekly found that "this self-described ambient-techno group lives up to the genre’s esoteric side.

"[7] AllMusic editor MacKenzie Wilson wrote, "Their debut, Mind Fruit, (1992) was more than just another techno record in the face of the genre's underground taking shape during the early '90s.

Opus III was barely a step ahead of electronica's late '90s surge, yet it was just strong enough to join the ranks or move beyond the scene.