Tool are an extremely innovative group, and their lyrics are very appealing to me, bordering on the metaphysical at times. This earlier EP release of theirs (earlier to Undertow) is just a sample of things yet to come.
This band is extremely talented and definitely worthy of all the praise heaped on them by fans, critics, and musicians. Their music makes you want to rethink everything you know about music. The percussion is particularly what stands out the forefront; the songwriting is excellent as well. The music is tight and agressive. The album cover is one of the weirdest I've seen. Definitely worth checking out if you're tired of all the alterna-crap out there.