"Barrie Examiner" staff writers stated that "Slow Jamz" is a "tribute to old-school R&B love songs", and highlighted West's line as an instant classic, "She got a light-skinned friend look like Michael Jackson / got a dark-skinned friend look like Michael Jackson". Caramanica praised the audacious execution of the "low-concept" song, stating that Foxx's inclusion on the hook should have been a car crash on paper, but was assisted by West's "keen ear for melody and near perfect sample selection". In a review of "Kamikaze", "The Atlanta Journal-Constitution" writers called it a "hilarious bedroom song". Writing for "PopMatters", Matt Cibula commended "Slow Jamz" for being "one of the finest rap singles in many years". He described West's verse as "swagger", and was impressed with how Twista added more syllables in his verse than other rappers such as Lyrics Born and Busta Rhymes. Soren Baker of "Houston Chronicle" stated that the song is a "crowning moment for Twista", and acknowledged that it "showcases his stunning delivery and flow patterns". He also referred to Foxx's chorus as "charmingly nostalgic".