And I only finished episode 2 just now. I'm on a Yandere kick and saw is on a suggested list. I watched a trailer and was like "Holy shit I have to watch this!" I love cute and psychotic! After this I'm watching Future Diary.
Episode 5 has me confused though. Looks like it is one of those "This timeline ends and this crazy shit happens, so let's go back and see what crazy shit happens on this other timeline! " type of anime, unless I missed something.
You should, after the second season, try out Umineko no Naku Koro ni. It's a "spinoff" of Higurashi, but it's still pretty good.