due to Z's original creator, Akira Toriyama, absence from this series the storyline line as well as the type of villains were reused with different names but the main goals and abilities of each one was the same.
the first saga villain wanted to rule the universe, freeza from Z
the second saga villain was a parasite, cell from Z
the last saga villain was pure evil, buu from Z
the main character goku also suddenly goes from super hero to zero with him being reverted back to a child thus destroying or limiting all his abilities from being shown in battle
the sound and artwork is much better than Z due to the availability of technology developed later than Z
but the only highlight i believe came only when goku achieved super saiyan 4 and super saiyan 4 gogeta
watch it to pass the time, dont expect too much
