This was the album that started it all.  Six songs, short, and sweet. It seems to leave you kind of out of breath, especially the title track.  I don't really understand why people seem to flock either towards hard tool,  or the artsy tool.  I find that all of there music is equally disturbing,  and inspiring.  Its called longevity.  Anyway, there isn't a starting point  for tool really as far as buying albums.  Just buy one.  None of them will  dissapoint.  Especially not this one.