Best one yet.
The mini-games are the best part of the game. Mainly because there aren't very many boards, and the graphics aren't amazing for a Mario Party. They make great use of the stylus, the microphone and the regular controls.
The game may be limited in single mode, but play with a friend and it's the best multi-player DS game yet. And even if you can't, then face off against a CPU.
Oh, and the character selection isn't bad either. Mario, Luigi, Peach, Daisy, Wario, Waluigi, Yoshi and Toad.