[5] In a review for AllMusic, Dave Connolly wrote: "Unorthodox Behaviour samples a variety of styles: from melodic to energetic, ethereal to mathematical.

Without a standout soloist..., Brand X does run the risk of sounding like a generic fusion jazz outfit, but their compositional skills pick up the slack nicely.

"[1] Markus Scharpey of Genesis News stated: "this is a well-done instrumental debut album.

It seems that all tracks were developed from jam sessions and structured later... Phil Collins is on top of his drumming game.

"[5] All songs written by Phil Collins, John Goodsall, Robin Lumley and Percy Jones.