Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Tool is exceptional

I absolutely love Tool. And Undertow is probably the reason why. Every song kicks butt. No track is boring or gets nerve-racking. The bass is awesome and Keenan's voice is I have to say, beautiful. Tracks such as Swamp Song and Flood have great rythm that some other bands just aren't capable of. This is definitely a great CD.