This game is a great one, focusing on the cuteness of Kirby rather than his trademark ability.
The game is controlled entirely by touch screen; pressing the buttons on your DS does nothing. However, the controls are very simple. It is all very nicely taught to you in the first level. Essentually, you tap where you want the Kirbies to go, and you fling them at various things. There are some tugging puzzles where you have all the Kirbies doing a 'tug of war' with something where you manically press a Kirby-shaped button until it comes loose. It works and it isn't tedious at all, unlike so many touch screen-only games. They've added a half-dozen 'mini' games to the story, but they are actually very fleshed-out. You can really spend three hours playing all the minigames.
The story is that the group called "Skullys" are terrorizing Kirby's world. They break him into ten pieces and now he must find him to become his normal self again. It's this reason that he isn't able to use copy abilities. It's a simple story that is looped together with story book-like story chunks in the beginning, end, and in between worlds.
As for my experience, I've had a ton of fun. I own pretty much every Kirby game that has come out in the US, and this one isn't the best of them, but it is in no way the worst. I found myself wondering exactly what made this a Kirby game, because it is very much like a Pikmin platformer. However, it is a great game that really should not be missed, even if you usually don't like Kirby games.