Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: A must have!

A great concert. Amazing vocals by Rik Emmett. He goes super high up there, without autotune! Masterful guitar playing. Shows how to make a three piece work!I have this both on CD and DVD and both are great quality.So why only four stars? They break into choppy interviews and crowd scenes in the middle of Rock and Roll Machine, for no apparent reason.