I truly love the concept and the story this series tells it's viewers. It is an awesome TV show! What I didn't like are a lot of extra and unnecessary motion: like show-off kicks, doges/somersaults and how characters waiting for no reason before attacking during real fights. Also, it is just dumb to watch when enemies have huge privilege since they outnumber and/or have better and more powerful weapons than main heroes, but are somehow still able to lose due to there stupidity that shows in how they attack: one by one and not using all their abilities in time when they are relevant.
If you ignore those facts though, the series are good and interesting to watch due to their story. I also love how they've put in the messages from Jackie Chan at the end of each episode. I recommend these mainly for kids 6-12 years old, but older people still might find these series interesting to watch.
I also recommend watching Avatar: The Last Airbender - The Legend of Aang, I liked these series even more than Jackie Chan Adventures.
Thank You for reading my review. I wish you all a good day!