Stanton Swihart of AllMusic gave the album 4.5 stars out of 5, calling it "a wild, weird, instantly left-field rap masterpiece from one seriously bugged-out, innovative loner."[2] Thomas Quinlan of Exclaim! described it as "an album that embraces the late '80s/early '90s of hip-hop, with old school beats and battle rhymes (the Primitive), while at the same time shaking hands with new school lyricism and space age effects (the Plus)."[4] Nathan Rabin of The A.V. Club wrote: "One of the year's most promising debuts, Primitive Plus makes the beats of yesterday and the flows of today sound like the hip-hop of tomorrow."[3]