This cd was never really accepted widely by the public.  Tool was not major when they released this, and that should be the reason, because this is just as good as Aenima and Lateralus.  It is heavy and light at the same time, showing how diverse their sound can be.  Fear is a big target, and it is executed to perfection.  "Sweat" is a very tough song, displaying Tool's start and introduction to their own ideas, which lead to their originality on all their other efforts.  "Cold and Ugly", "Jerk-Off", and "Part of Me" are also showings of how they came to be.  This is actually much better than Undertow,  which seemed to focus almost entirely on fear.  Get this if you are new to Tool.