Don't even bother. Get a standalone Wii remote and put the ten bucks saved toward a more competent minigame collection.
There are two ways to view this: optimists will have a “why not” attitude, and compare its purchase to buying a Wii remote while scoring a handful of cheap minigames along the way. Pessimists will recognize it as overpriced software bundled with a Wii remote, and think “why bother”. Half full, or half empty? It doesn’t really matter. It’s just a half a glass of plain, flavorless water either way.