I found the story slightly interesting, but not half as much as A Wrinkle in Time. It felt a lot like the same story, just in a different form. The central theme was love and it was Meg, once again, who needed to learn the lesson. So many things were obvious and drawn out that it really got to be tedious.
Meg is still annoying. She doesn't seem to have grown at all since the last book. Except, Calvin is now her boyfriend (which seems so weird since she's about 13 or so and he's somewhere around 17.)
I can basically sum the book up like this: Meg loves everything and it makes everything turn out all right.