Gucci Mane's mixtapes -- and even his "official" albums -- tend to be hit-or-miss, but even ardent Gucci fans may find The Return of Mr. Zone 6 rough going. Bumps in the road include two ill-advised forays into Auto-Tune ("My Year" and "Pretty B*tches") and 1017 Brick Squad understudies who can't match the leader's charisma or panache (save for Waka Flocka, who makes several appearances). "Mouth Full of Golds," "This Is What I Do" and "Hell Yeah" are among the better tracks.