As a fan of this series for over 10 years, I can easily say that Detective Conan has always been near the top of my list. This series is very well-known in Japan and other Asian countries, with its fans ranging from elementary school age to elders. This is due to its intriguing plot and characters. As earlier labelled, this series indeed falls under the mystery genre. However, I believe it also has the ability to draw in readers whom are fans of other genres, such as myself. I was captivated by the interesting plot, the humour, and lovable characters when I was a child, and to this day, I'm still in love with this series because of those reasons.
Now, while everything I said so far are positive reviews of the series, I did add in a "but" in the subject. In my opinion, if there is one flaw with the series, it's that it's too unnecessarily long! I'm definitely not the first person to mention this on here, so I won't talk too much into it. Basic point is, I feel like now that Detective Conan has gained a lot of fans in most Asian countries, Aoyama Gosho is just dragging it on for the money (just my opinion though). In an interview from 6 years ago, Aoyama mentioned that he already has the ending planned out; however, here we are 6 years later, it's still no where close to the end. This is extremely frustrating, especially for fans like me who has waited many years for the big conclusion. As much as I love the series, I also wish it would end soon, because seeing it dragged on like this for no reason, is extremely agonizing and annoying.
In conclusion, this series is definitely a good read, but its unreasonable length can be very frustrating.