Oh I've played the game a lot in the past. And yes...it is good. Your money won't be wasted.
In my humble opinion, its one of the best Dragon Ball games that were made in the 90's (before next gen.) because of the system it uses. The controls are very simple and easy to learn. The gameplay is fast-paced and can be CRAZY at times..much like the anime. The graphics are a bit dated by today's standards, but that's a gimme. Even so, they were done fairly well, I think. The sound effects and voices are straight out of the anime and sound good, and the music is AMAZING. Kenji Yamamoto did a fantastic job with the soundtrack.
here, check my vids..http://youtu.be/YfC7nAN_spEhttp://youtu.be/UwnoHWAHdKQ
With that said, the ONLY reason I would rather play the PlayStation version over the Saturn version is because the graphics are a tad better to look at in a couple areas. Everything else is identical, though. Its a really fun game once you get into it.
If I would compare it to any other game, I would say Power Stone is similar, except you can fly at will in DBZ.
Good luck, man.