You'll play it, and you'll love it.
Gameplay is just plain fun. You can play over 30 playable characters and summon over 70 characters.
Graphics are good and not bad at all.
Sound, it's okay, it doesn't have a lot of music though and the sound FX could've been better, but some of the music is very good and catchy.
Overall, Jump Superstars remains incredible even after beating it 100% and definetely worth importing. If you love anime/manga and have a DS, import it now, you won't regret it. And if you do regret it......"LOVE THE GAME AS IF YOU WERE TO DIE!!!" LOL.