"The key thing about this set is you get to hear the beloved "Roxy" era version of Zappa's band at a crucial growth point, just after Chester Thompson and Napoleon Murphy Brock had joined the band. And while many of the tempos are more moderate than say the double-speed madness just a year later in Helsinki Finland (...), Halloween '73 shows us just how well oiled they were at the start - a great, swinging jazz fusion band that could (and would!) only get better and better ... If you are a Zappa fan, especially of the Roxy era band you need Halloween '73".