For those who doesn't know about Higurashi. Three points:
(1) Higurashi has 50 episodes in total. Second half (24 episodes) are called "Higurashi no nakukoroni Kai". "Kai" means "Answer to mystery". You won't get answer and you won't understand the whole story until you watch "Kai" part.
(2) Style is somewhat similar to US drama "Lost". You will keep wondering if bizarre phenomenon will be explained by science and logic, or by pure fantasy.
(3) If you don't know about Anime, you may think some part are very childish, silly or weird. There are many "Moe" elements in this anime, which are prevalent in current anime. Maid dress, multiple very young female characters with one central male character, are typical "Moe" elements, and you should just ignore them and they shouldn't distract you from concentrating on the main story. What's new about Higurashi is the combination of "Moe" and horror, not unlike "Elfen Lied" which combined "Moe" and Science fiction. But "Moe" part may be just annoying for those who like serious drama.