4 stars, competent as always with Pixar. Even if your not entirely bowled over you're unlikely to want to walk out of the film. Worst bit is having to watch the trailers for similar certificate films - such dross.
I did find it very odd that there's a switch between live action film and animation. The Axiom cruiseship idea is also one that Rightwing Libertarian nutters in the Sates are infatuated with every couple of years.
http://www.guardian.co.uk/environmen....greenbuilding
Personally I think having them all on a big ship in the middle of the Atlantic may be the best place for them....