For the most part, the series is really good. The concept is amazing. I liked everything up until the last few episodes, the ending was somewhat disappointing. But besides that, the only other complaint I have is the constant borderline pedophelia remarks. Other than that, the character writing in general is very good. The story threw me into a roller coaster of emotions, which is personally what I look for when looking for an anime. I give it a solid 9.4/10.