by Jason BirchmeierStated simply, Mas Flow is a landmark reggaeton album. Along with Tego Calderón's El Abayarde, also released in 2003, it was the first reggaeton album to meet a mass audience. In doing so, it introduced the world not only to the musical style itself in album format, but also to Luny Tunes, the production duo who would quickly become the biggest hitmakers in the reggaeton world, as they would go on to hit the jackpot in a year's time with Daddy Yankee on his Barrio Fino blockbuster. And too, the mixtape nature of Mas Flow helped introduce a host of first-rate reggaeton vocalists in the process, pretty much every heavyweight the style had to offer circa 2003: Calderón, Daddy Yankee, Don Omar, Wisin & Yandel, Héctor & Tito, Nicky Jam, Baby Ranks, Zion & Lennox, and many more. Granted, Luny Tunes would develop their style further in the wake of this release (in particular, the second volume is an impressive stride forward), but...