In my opinion, the Ultraman Tiga series is pretty good, although the concept of the story is the same as the Showa era Ultraman series in general, namely there are members of the earth defense team who get the power of ultraman, then fight to protect the earth while hiding their identity.
But Ultraman Tiga has a better and fresher story than Ultraman of the Showa era. The CGI in this series is also better, although it's still a bit rough. Although the nature of the story is a bit stiff and lacks comedy, the story can still be enjoyed well.
The story also features some mature sides but is still suitable for children to watch, so this series is suitable for all ages. The Ultraman Tiga series also introduces a new concept, namely the ability to change forms as its basic ability. This has never existed in an Ultraman series before, and makes this series even more interesting.