Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A "flashback" to big beats and blasting bass

Already owning "Surrender," I bought this CD for the B-sides and was pleasantly surprised. "Flashback" is a super tour-de-force a la "Loops of Fury," and it alone made the disc worth every penny. "Scale" was a little dissappointing, based around cheap-sounding, gimmicky synth scales, but it holds up well enough. A good buy for any Chem Bros fan.