Until CBS re-release all the original Rock Machine albums, this one will have to do. Arguably it's not "the best" of the series, as that would mean including only the best tracks by the best-known artists; it's more a representative cross-section, with classics such as Janis' Ball and Chain alongside obscurities such as the Peanut Butter Conspiracy. A good bit of nostalgia for the tunes of half a century ago (who knows where the time goes!)