Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Finding Their Voices

"Head To The Sky" marks the period when Earth,Wind & Firebegin to shed some of their artsier fusion stylings in favor ofa tougher,funkier sound.Now they hadn't made the move into popat all-the band still relies on heavy afro-latin percussion andas on the Santana-like "Evil",and a healthy dose of improvisingas on the elaborate closing jam "Zanzibar".At the same timethe heavy funk of "Build Your Nest",the lovely pastoral R&Bof "Keep Your Head To The Sky" and the near gospel of"The World's A Masquerade" point to being three of this bandsvery best songs."Head To The Sky" serves as a perfect careerbridge-not the least bit what had come before but not the future yet.One wonders what might've happened if Earth,Wind & Fire had decided to expand on this varriation of they're sound.Their subsequent pop success might've taken a drastically different form.