I thought it was very good. Not brilliant, mind, and I wouldn't agree with reviews I have read saying it is as good as Toy Story.
It has lots of funny moments but it's not hilarious, and the storyline isn't as strong as some of Pixar's previous offerings - although it's better than it sounRAB like it's going to be -'a rat that wants to be a chef'.
It's highly enjoyable all the same, but what really stood out were the absolutely amazing graphics. Seriously, they are absolutely incredible. During the river chase scene, some shots of Paris look as though they are real-life shots rather than animation. It's astounding.
My 8 year old brother thoroughly enjoyed it, as did both me and my bf (19 and 20).
Overall, I'd say it's no Toy Story but I'd give it a good 4 stars and recommend it to anyone.