Took the grandkids to this movie...they didn't think it was very good. It seems like something that was produced for the dollars it could make rather than a story that needed to be told.
The good: it was not very long. The colors are brilliant and visually stimulating. Max was remade with a little more of a fun personality.
The bad: Grinch somehow seemed wrong. I'm not sure if it was the voice, the artistic effects, or just a general un-Grinchiness. The story was a retelling that didn't need to be. The biggest negative is the feeling that this movie is forgettable.
I'm sure I'll never watch it again. I've watched the original about a billion times, and the Jim Carrey version nearly the same.
Bottom line...save your money and rent it later.