Escape from Planet Earth is a good movie for kids. It's funny, and colorful. However, do not think that it's bringing anything new to the table. It's nice entertainment, without any real disappointment, but it's a light meal.
It's real and only strength lies in the slick and extremely colorful graphics. they have their own style and there's not denying the appeal or the design of the alien home world.
The rest is merely acceptable. The story is linear, the scenario unimaginative, and the dialogs simple.
I liked it because it was fun, but don't expect much out of it and you won't be disappointed.