This 1976 release was Bobby's final album with both Marvin Santiago and Frankie Hernandez on lead vocals. Granted, this album was not as mind-blowing or as superb as its predecessors (1974's "Rey Del Bajo" and 1975's "In Motion") but is still chock-full of the heavy-duty, no-holds-barred "Salsa Dura" found on Bobby's Fania releases.