This is a very good mystery anime. Whit lovable characters great animation and music. There are multiple story arcs concentrating on different characters. While the mysteries them selfs are not very complicated they are very well done. As for the characters they are mostly well done but some don't get much attention, like Alice's 3 helpers. As one of the main characters Alice also didn't get much back story to how she became a detective. Narumi also felt generic as an Main character, but that's just how i felt about it. Over all if you like mysteries with a darker tone this will be great for you as well as fun.
p.s The Fourth is a badass