As you might expect, I read this and enjoyed it quite a bit. I had never read Dave Eggers before, but right after reading The Wild Things, I read A Heartbreaking Work of Staggering Genius. It was, of course, staggering.
The Wild Things was lots of fun! I love the way Eggers gets completely into Max's head without irony or affectation, and some of the expanded glimpses of the characters were fascinating. There's a lot of psychological depth going on inside the wild things, as well as inside Max. And as a fine example of unpretentious but brilliant writing, this little passage near the beginning of The Wild Things is where I fell in love with Dave Eggers:
One might think that a boy who was out in the snow for so long would get cold, but Max was not. He was warm, partly because he had on many layers, and partly because boys who are part wolf and part wind do not get cold.