I just finally saw this movie and I'm 17 years old but keep in mind that I read all the books growing up and with that said, I loved this movie in spite of its flaws. The humor is enjoyable for fans and some adults, the animation is really good and depicts the minds of George and Harold when they made the original comic in the Captain Underpants lore. If I had some complaints, the movie threw a lot at you and barely had time to explain any of it, and some of the characters felt a bit underdeveloped. But overall, I still had a lot of fun with it and it lives up to the source material! Would recommend!