I love Mos Def - now Yasiin Bey - but my Gosh is he a frustrating artist. He hasn't really put out a solid album since 1999 with Black On Both Sides. Most of his music has been performances and appearances here or there, usually with him being pretty darn stoned and otherwise not in to his own music. He seems a bit more interested in his film career, which honestly isn't that great. The best film he's been involved in has been was Hitchhiker's Guide to the Galaxy, which was exceptionally good but more from a filmmaking perspective than an acting one.
Despite Yasiin's lack of hard effort, nuggets of goodness really crystallize. I have to love that he would perform Fela Kuti's work at all, much less with a full band. Good look.