The Shack

So, I finally read The Shack. Apparently, there's some controversy about the book. But, if you've read it. I'd be interested in your feedback. (And, not how badly written the book is -- that goes with out saying -- I'm going for concepts here . . .)

How did you the author's picture of the Trinity compare with your theological understanding?
What did you think about the author's comments on the church?
What was your response when the main character opened the door to the shack?
How do you feel about the author's explanation of Christ as fully God and fully man?

There's no wrong answers here. I've just heard about the controversy -- and I'd like to understand it . . .