I would have given this movie 3-1/2 stars, but you can't do halfs, so I'll give it a four.
For kids, this is an absolutely great movie. Visually, it's among the best CG animated movies out there. Everything on the screen moves, bounces and is poster bright. They've created an entire world here full of springs, hoops, wheels and just about everything else. There's always something to see.
For adults, it starts out a bit on the slow side, but is made up for by snappy dialogue (especially Robin Williams) and lots of references to other movies that the kids won't even notice, but you will. For the first half of the movie, I'd have rated it about 2-1/2, but it redeems itself in the last half when it really picks up the pace and just zips along to a very, very satisfying conclusion. It also has the best song and dance finale since Shrek. So I recommend it.
One final note - The BD case is marked as English DTS-HD Master audio. This is incorrect. This version which we get here in Canada is actually an international version which I presume was necessary in order to give us the french Cdn language track. Only the american BD has DTS-HD Master Audio.
However, as compensation, this version not only has the standard American English DTS 5.1 track, but also a total of 20 other audio tracks! And at least half are in a full 5.1, a mix of DTS and Dolby Digital depending on the language chosen. Not only is there everything from French to German to Spanish but also Danish, Swedish and a least a couple of languages that I couldn't figure out. They even throw in full DTS 5.1 tracks of Australian English and U.K. English for good measure. No wonder they had no room for the DTS-HD Master English track! And yes, they have an equal number of subtitle tracks as well.