What makes The Best Kept Secret by Ultramagnetic MCs notable?

'The Best Kept Secret' marked a notable return for Ultramagnetic MCs, showcasing their influence on the underground hip-hop scene. The album received attention for its innovative production and lyrical complexity, contributing to critical discussions about the evolution of hip-hop during the mid-2000s. Released on January 9, 2007, 'The Best Kept Secret' is Ultramagnetic MCs' first album in over a decade, following their 1996 project 'The Four Horsemen.' At this time, the group was attempting to reestablish their presence in a hip-hop landscape that had evolved significantly since their heyday in the late 1980s and early 1990s.