I'm actually not going to put spoilers in this particular post, but I figure others may do so lower down, hence the thread title.

My verdict:

Film was good. I could find no fault with it. It was a faithful treatment of Douglas' work. Even where it differed from the written work, it differed in a faithful and logical way.

Its only real problem is that Douglas' humor works best in print, so it wasn't uproariously funny, just grin-and-chuckle worthy. But they were faithful to his jokes and all the best lines are still in there.

In the places where major plot elements were modified, they were done in order to tie things together more cohesively. I think they did a very good job of that.

The actual animated "book" segments were beyond perfect. They were precisely what I'd hoped they would be. It was the one thing that they absolutely had to get right in order to win me over. Not only did they get those right, they surpassed my expectations.