Story: most of the cases they present are really entertaining, and often suspenseful. I find myself anticipating what will happen and I enjoy the suspense; I think that's what pulls you to the story. However, having read so many chapters now, with almost one case every 2-3 chapters, you start to find some ideas being repetitive. Overall though, it's still good.
Art: not much to say for art. It's a little different to the typical drawings of manga, but that doesn't make it bad. The more you read, the less you'll mind the drawings.
Characters: repetitive use of characters can be good or bad. Good thing is you familiarize yourself with them, bad thing is it does at time get boring. However, I like the cast of conan, it fits with the story pretty well, so, in this case I don't mind repetition :)
Enjoyment: same as for the story. At first it's very thrilling but I find it's slightly repetitive now, so it's not as good as when I first read it. But the cases itself are really cool, you learn a lot of new things. Sure, not all the things are probably accurate, but they are cool nontheless.
Overall: I think the only two aspects that kind of pulls it down the score are story and characters. But overall, it's worth a read if you're into crime solving stories. There's also slight comic relief in this manga which contrasts nicely to the seriousness of the cases.
