Like past Disney without the genius (e.g Fantasia, the dark forest scene in Snow White, etc) but with more puns thrown in. Or maybe "animated ho-hum Spielberg" is more apt.
Could be OK to take your kid to, but IMHO even kids (or especially kids) deserve better.
And not to be accused that I speak without offering an alternative, I think that something like "A nightmare before Christmas" is light years ahead of Pixar's work, in storytelling, artistic vision, and even visually (and I'm not saying that because of its "dark mood". Light stories could also be told in a more artistic way than Pixar's).