The best Bomberman game made to date.
The one thing I've always loved about this game was the soundtrack; the music in this game is perfectly ambient but also energetic at the same time, and it just fits perfectly. It's very memorable. Graphically, it's not much of an improvement over Bomberman 64, maybe a few textures are better, but the best improvement is just the level design. There are a lot of levels in Bomberman Hero, and they are all unique and entertaining. Also, there are a lot more bosses in this game, and it adds to the challenge.
The only problem with Bomberman Hero is the story. It's very shallow, and so is the game in the larger scheme of things. You'll get bored of it after some time, and it doesn't inspire adventuring at all like Super Mario 64 or Banjo-Kazooie (it doesn't use a hub system).
Overall, Bomberman Hero is a good platformer, and the fact that you're a spaceman throwing bombs around makes it that much better, but it doesn't offer nearly as much of an engaging experience as other 3D platforming adventures.