You can check out a very good review for MySims Kingdom on the Wii over at TWGNews.  It’s a long read, but it does go into great detail in case you’re still wondering if this game is right for you.

After about half way through the game, the missions begin to ramp up in difficulty and each character will give about four or five new tasks on each island. Characters you may have not visited since the game first kicked off will be refilled and ready for you to lend a hand and these new problems can begin to be a handful. These new missions are of a far greater challenge than the first set as some tasks will require you to do hundreds of points worth of redecorating. By this time, you’re probably well accustomed to the gameplay and can pop out masterpieces in minutes.