I bought this game due to a great discount in the store, then I had to watch the show. I didn't feel like jumping into an anime game without enough context. I have no regrets, the anime was great.
The game is fine, it has cool animations for the 1 vs 1 encounters and some arenas suffer from the force of the fights.
Playing it with the Japanese dub is more enjoyable, but I'm not demeriting the job with the English dub. It depends on how you watched the show.
You shouldn't play this game if you haven't watched the anime series.