Wow, I'm actually surprised at this game. The developers have actually made an effort with it. It doesn't feel frustrating, it has a simple control scheme (ideal for kids, who are the primary audience), some good visuals (OK - not to the standard of an AAA title but good compared to other family titles), good voice acting, soundtrack and a few other things, such as the sailing mission make it feel varied.
 
Achievements seem to be fun for family but I think they went a little over-the-top with collectables. Although, they've made it easy to track down what you are missing (it tells you what collectables you have in each mission). I'm actually enjoying it. My avatar wasn't chosen because of this game, though. I've actually been following up on the film/soundtrack. ;)