Even though I had not heard much good about this movie, I did have some hopes if for nothing else than the whimsical adventures of the children. To that end, I thought the children were great! They were the highlight of the movie; interesting characters, well played and well written. In fact, I found the plot in general to be well conceived.
But there were many unfortunate factors that caused this piece to slide downhill for me. Jim Carey. While I think he has great talent (and this movie helped him improve his accents a little), his mannerisms are just too strong. But he was not the only problem. I found all the adults to be idiots. Its one thing if you make a children's movie, but this is not a movie for children specifically. It is dark, deep and mysterious. Why do the adults have to be so thick? The children stand out like red blood on newspaper.
My one complain of the children is Sunny - too much CGI. While her character was cute and charming at times, they gave her too much credit and had to adapt for it by synthesizing certain movements and postures. Bad choice, as it makes the character seem unreal.