I don't think I could disagree more with the other reviews here. Yes, it's beautiful to look at, and there are some 'funnies' here and there, but this is NOT a film for under 8's (and that's the angle I'm coming at this from, whether it's appropriate for younger kids).
I can't think of another sequel which is such a departure from the original.
The original was warm and very young-child-friendly. This is NOT. This is an intense action flick. The frequent references to killing and death are not what I want for my under 8s and the moment.
The torture (seen) and murder (not seen but very clearly implied) of a car in one particular scene beggars belief when considering where this franchise was in Cars 1. And there are numerous other examples.
I simply can't believe that Pixar would make something so different from the original. We go to see a sequel to get more of the same....we would still buy the tickets and the toys...why not give people what they expect? It makes no sense to me.
I'll be the first to admit that my 7 year old is a little more sensitive than 'average', but he was up until midnight last night with nightmares.
If you're expecting 'Cars', I just wouldn't recommend it.