The game is fun, and looks great, but is a bit too easy to beat.
The controls are okay, and the gameplay is good, though you've likely seen it somewhere else. Just think Mario combined with a Spidey DS game, and you have a good idea of the games controls. Each member of the family has a special power: Homer can turn into a ball, Bart can glide and use a slingshot, Lisa has Buddha powers, and Marge can summon mobs to do her bidding. Out of those, my favorite levels would belong to Marge, because in those levels it seems like more of a platformer than a 2-D game. However, Marge has only 3 levels in the game, so it is rather short.
The game doesn't have much for replay value, aside from collectibles and pet Homer, a wicked nintendogs-video game pet farce featuring everyone's fat favorite. The Simpsons game is about a days worth of play, but is fun the whole way through. A good rental game for sure.