Later critics have given favourable reviews. AllMusic's Eder awarded it four and a half out of five stars and described it as "the first importantindeed, essentiallive album to come out of the 1960s British rock & roll boom. In terms of the performance captured and the recording quality, it was also the best such live record of the entire middle of the decade". In a separate review for AllMusic, Rick Clark noted "Smokestack Lightning" other songs were open-ended improvisations that helped lay the groundwork for groups like Cream and the Jimi Hendrix Experience." Bowling calls the material "raw and powerful" and Russo adds it is "a completely faithful reproduction" of the group's early shows. "Ultimate Classic Rock" listed the album in its list of "Top 100 Live Albums", calling it an "explosive document of a British blues band fueling a decidedly American music with power, fireworks and amped-up resourcefulness".