Musicians
- Willie Colon: Trombone, lead vocal, coro, arranger, composer (A4, A5, B2-B4), producer
- Eric Matos: Trombone
- "Prof. Joe" Torres: Piano
- Santi Gonzalez: Bass
- Louis “Timbalito” Romero: Timbales
- Milton Cardona: Conga, brasilian percussion
- Yomo Toro: Cuatro
- Jose Mangual: Bongo, percussion, coro
- Ray Armando: Brasilian percussion
- Elliott Randall: Electric guitar
- Tom Malone: Trombone, tuba
- Low Soloff: Trumpet
- Antonio Montagna: Trumpet
- Jose Cigno: Trap drums
- Rodgers Grant: Piano
- Eddie Rivera: Bass
- Mario Rivera: Baritone sax
- Bobby Porcelli: Alto sax

- Hector Lavoe: Lead vocal
- Ruben Blades: Lead vocal, coro
- Ada Chabrier: Coro
- Ernie Agosto: Coro

- Marty Sheller: Arranger (A3)
- Baden Powell: Composer (A3)

- Good Vibrations Sound Studios. 1440 Broadway, N.Y.C.: Recording studio
- Jon Fausty: Engineer
- Lee Marshall: Photography
- Ron Levine: Art, design