extremely fun while it lasts, but too damn easy and short for it's own good!
I ordered it on ebay, the other day, and when it shipped, I popped it into my SP. First of all, I don't reccomend buying this game on ebay. The save feature didn't work. Not that I would need it.
I played through the entire game in one sitting, about 2-3 hours on the couch while watching TV. That is insanely short. And not to mention the game is ridiculously easy. I beat it with about 2-3 lives, so obviously I wasn't just pulling a SMB3 and loading up on 1ups. In fact the only remotely challenging part of this game was the final 3 bosses, but I should hope that the final boss is challenging.
But this is a pretty fun game, while it lasts. There are 7 worlds, and some fun bosses. Tons of powerups for Kirby. You'll find yourself laughing at the more ridiculous ones.
But is the fun worth it, if it only lasts a few hours? For me, yes. This is a pretty entertaining game while it lasts. And there is also multiplayer, and a few fun mini-games.
If you can get this game very cheap ($5-10) then go for it.