The movie itself? Very mediocre.
Really, I could forgive the lame plot if it only had some good characters and clever humor to make up for it. Unfortunately, the characters' quirks weren't at all original let alone funny, and about 57% of the humor was centered around mainstream music. Want an example of how bad it got? They had a Spice Girls song in it. It was done for humor, but it didn't stop any of us from covering our ears and hoping that the goddamn song would end already.
The fact that we MSTed a lot of it didn't help much either (when you're able to MST a comedy, that's a sign that you've walked into one lame comedy movie).
Another problem with it was overdose of angst in the most awkward places. Right after the first twenty or so minutes of the film, there's a scene where Chicken Little is sitting on the rooftop
The animation wasn't really as great as decipted in the trailers, either. It's "good" but definitely not Dreamworks or Pixar. The animals just don't seem much like animals (with a few exceptions, such as the dogs, the goose, and the donkey), more like a bunch of people in animal suits. Really? It would've worked a lot better as a--gasp--2D animated film. Trying to make a bunch of animals that walk on two legs to look "realistic" with 3D animation isn't an easy task to pull off without making it look ridiculous.
Overall, I'd give this a C-. While it had many flaws, it was, for the most part, tolerable, and I liked Fish out of Water. We needed more of him.