People declared, "Pushed by a killer bass riff, 'I Want It Now' bubbles like a craterful of lava."[2]
Don Waller of the New York Times found that "Cameo rolls back the rug for a wall-to-off-the-wall dance party, with the house-of-whacks "I Want It Now" and the over-the-counter Afro-desiac "Nan-Yea" providing the most innovative moments.[3] Chris Heim of the Chicago Tribune called the song a "catchy, Sly-styled pop funk tune".[4]