When I first started this series, unfortunately I knew what was happening, and I think that kinda messed things up for me, It wasn't a pure experience.
If you haven't seen the series, you really should, it's now my favorite series, it somehow manages to be creepy, violent, gory (not as gory as Elfen Lied), and cute all at the same time, and I think it pulls that out very well.
I kinda thought it was like a combination of Elfen Lied (my old favorite series), and Lucky Star (my old second favorite), assuming you liked both series, you should probably like this.
I'm watching Higurashi no Naku Koro ni Kai next, unfortunately, it isn't dubbed (I know, dubs are not the proper way to watch anime, but I'm not that great of a reader), so it may take longer to watch, and I might not like it as much.
Higurashi no Naku Koro ni gets Ivo's Seal of Approval.