Wu-Tang not releasing Inspectah Deck's debut back in 1996 was one of their biggest mistakes. It only made sense; they were at their peak of their careers with great albums from Meth, ODB, and Ghostface Killah and classics from Wu-Tang, Raekwon, and GZA. Finally releasing Deck's debut, UNCONTROLLED SUBSTANCE in 1999 in the mist of others dropping their sophomore LPs (GZA, ODB, Raekwon) and debuts (U-God) seemed like a bit of a hesitant move in their part. Deck posseses one of the most lethal flows in the Wu (and hip-hop in general) with excellent metaphors only matched by Method Man and a great flow only matched by GZA/Genius. It is no wonder why Deck is considered the Wu's underdog. Even with production by True Master, 4th Disciple, Mathematics, RZA, Deck himself, and Pete Rock, the album at times lacks in substance. At this point in 1999, The RZA was not in charge of none of the solo clan members albums because he was focusing on his Bobby Digital career and the Wu affiliates. More production by RZA on this album would of beeen better (he only produced "Movas & Shakers", an okay song, and the even better "Friction" featuring Masta Killa). Guest appearances from KillArmy MCs Killa Sin & Baretta 9 ("9th Chamber"), Streetlife ("9th Chamber", "Grand Prix", and "The Cause"), La The Darkman ("9th Chamber", "Loving You"), U-God ("The Grand Prix" and "Longevity") and Masta Killa ("Friction") help Deck beef up the album a bit. Deck showed his productions skills as well (as only hinted on WU-TANG FOREVER's "Visions") on tracks like "Femme Fatele", "Word On The Street", "Elevation", "Hyperdermix", and "The Cause". Now, the singles: The intended first single, "R.E.C. Room" is easily the best song as well as the official first single, "Word On The Street". The follow-up single, "Show & Prove" is a good song as well. Still, if this would of been executived produced by RZA and released in 1996, it would of been much better.