I suggest going into this anime blindly with little to no knowledge of its plot. Then after you complete it, watch it again. This is an anime you want to break down and figure out what exactly is going on. The unique artwork and the quiet, slow pace sets the viewer in an almost meditative state which seems intentional. :p
-Will never lose its relevance as years pass. Fun Fact: This aired at the same year Google got its name.
-Watch it- Learn about it -Watch it again