System Of A Down's last record is their best for many reasons. First of all it has one of the best songs they have released ever being "Holy Mountains". Second of all the album is heavily consistent from beggining to end. Third of all thr guitar work on this album is amazing, Daron Malakian created his best riff's for Hypnotize and it's also quite outstanding how good Mezmerize is, since it was made in the same period of time as Hypnotize. The band matured a lot from albums like STA or Toxicity witch were way less consistent releases. The best thing about this album is the amazing vocal harmonies created by Serj Tankan and Daron Malakian on songs like U-fig and Tentative