Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Essential thrash metal

All things considered Rust in Peace probably stands as Megadeth's greatest album, though some might cite Peace Sells instead. Either way, Rust is a first-rate speed metal extravaganza which showcases the best elements of the genre: it's all fast, furious and aggressive (and yes, *heavy*); but it's also technically complex and precise, well-organized and features some socially-conscious lyrics as well. With the exception of the guitarless throwaway 'Dawn Patrol', every track is worth hearing. 'Hangar 18' has always been a fan favorite as have 'Holy Wars' and the raging title track. This comes at the tail-end of Megadeth's thrash years and indeed near the end of the genre's run of popularity, and it's a mighty fine way to recall the style's glory days.