"Excellent"
I've read/heard much from John Irving, and this one finally overtook Owen Meany as my favorite. I was unimpressed with the main character at first...stick with him. Rarely have I thought back to a novel as often as I've considered this one. Compassionate to both sides of the abortion debate, it's a good book even if you have already decided on your stance.
Also, the voice of the narrator is lively enough that I didn't find my attention drifting, as it sometimes does...