alt Hacker NewsI watched the movie and then read the book.
I tend to prefer movies as a storytelling medium, and enjoyed watching the story unfold that way. I ended up just wanting to know more about things that were implied in the movie but not explained, and the book filled in those gaps well.
So if you want to do both, and want to get something new when you do each, then, having done it that way, I would recommend it.
Edit: reviewing my app history, it took me somewhere between 10-11 hours to read the book, and I do not read fiction especially fast.
I often feel similarly to this when it comes to anime vs manga. I've explained it to people as the anime with its voice acting, music, motion, and color being able to present a better version of the story. You hit the nail on the head with reading the book after to fill in blanks as well. I like to say the manga often has bonus details, but if I'd read it first, it would spoil the anime, similarly to reading a movie script before watching a movie. Basically no one agrees with me on any of this so I was surprised to see your take being similar to mine.