My older kids actually liked this game. Even though they are a bit young for it (8 and 6) they still played it well. I am going to buy it for them for Christmas (not the game fly copy). A local used game store has this little gem in stock and I will be adding it to my collection. Sending it back to try out others in my queue. One major upside is that I didn't have to spend all day teaching my six year old how to play it (the controls are instinctive). Having great hand eye coordination isn't really required for this game... If they can play Wii sports they can play this game.
My daughter 8 and 10 begged for this game and it was worth the wait for it. They absolutely love it. Now that we have it they are begging me to purchase it. It's the first game that I have seen them work together as a team and have fun at the same time. Their only complaint was that they can't control the camera angles for better playing. But other then that they are very happy with it!!
I got this for my 4 year old son as he is very advanced for his age and plays alot of other games with a 10+ rating and this game was not only too hard for him, but I tried playing it myself and it was very hard for me too, only kept it 2 days before sending it back because even I couldnt get past the first case!