Cooking Mama 2 was a good pick for short-burst plays, but it disappoints in the long run.
First off, this game is really 2D. The graphics are highly chibi-looking and don't provide much of a sense of depth. The recipes are also short and easy to do, which means that even after you beat the game 100%, it'll only have taken you at most maybe 20 hours of gameplay. In terms of replay value, this game has very little. The only thing I would go back for would be to cook for fun (which wouldn't last very long), or try and beat my challenge scores on the challenge mode. And of course, after a while that becomes impossible.
However, this game does have immersive recipes as well as being short. Some can even be quite fun to cook. After completing all 80 though, there's not much left to do. The touch screen is very responsive and correctly executes the exact motion you commanded, and is usually quite rapid in doing so. So cooking was never really much of a challenge.
The music is pretty cheesy though, and the voice acting of Mama is done very poorly. She can't pronounce things clearly at all.
Overall, this game was short but kinda fun. I'd say just rent it, buying it is a waste of money if you're only going to play it through once. There really isn't much else to say about this game. It was so short, this review can't be much different.