Tool can be considered the King Crimsom of the 90s and the new millenium, therefore they have a long road to walk , a lot of experimentation to offer and a million of new sounds and innovative concepts to show, Aenima as their second album can be considered a classic of the genre, vocalist mental insanity, guitars rythm explosions and then calm and then going mental and calm again , occassional exagerated and distortioned bass loud sounds and sonic experiments completes this masterpiece, Tool have a lot to offer in the future