A Solid Futuristic Version of Batman What really made the series work for me is that the story had a solid backbone. The characters in the series were all well developed and had great dialogue. I don't think the story would have worked for me at all if it didn't have those brief interactions with the side characters.
Another thing that really worked for me was the setting. The futuristic world was well built and thought through. The setting felt really believable, because it did little things like introducing new vocabulary, futuristic sports and arcades.
However, there was one thing that didn't work for me was the poor science fiction writing. If you know anything about physics, chemistry or biology gets it wrong A Lot, not all the time, but a lot. Since the main audience is kids, maybe it's not a big deal for the most of people, but for me it was something that constantly took me out of the show.
All in all, it is a solid version of batman with a great soundtrack and animation and for me personally it is the best animated version of batman. Though if you're into more adult like series with better science, I would recommend you watch "Ghost in the Shell" instead.