I ended up seeing Monsters vs. Aliens quite by accident, when—while questing for movie gift cards—my girlfriend suggested we see a movie, since we were already there, and it was really the only thing of interest at that time that I hadn’t yet seen, and she had been kind of interested anyway. (I am uncertain whether that was a clever plan on her part, banking on the fact that I’d rather do just about anything instead of go home to work.)
So we ended up seeing the movie—in 3D, no less—and it was okay. The animation was fairly typical for a computer-animated movie, the script was reasonably funny (albeit laden with already-dated jokes and pop-culture references), and the voice actors was fine. I was entertained. The 3D did not give me a headache or hurt my eyes. It doesn’t hold up well in comparison to anything from Pixar, but then, few movies do, and it’s not especially clever. But it had its moments.
It’s not something you need to rush out and see, and I don’t think the 3D element was so awesome as to make it worth seeing in the theatre. But, it’s an amusing enough movie, and will likely keep you entertained.