Good Dinosaur was a letdown. It didn't feel like a Pixar film, it was more Disney or Dreamworks. Actually, essentially it was Ice Age all over again. It had very beutifull photorealistic world, mountains, forests, flowing water. It was beautifully rendered, very athmospheric cinematography. And then in contrast the dinosaurs were the most cartoony design ever. It didn't really work imho. Though to be fair, if the backgrounds had been cartoony as well, it would have been even closer to Ice Age. Also, what deep west has to do with dinosaurs? That was really weird combo, it was really hard to get in the world and relate.
There were some cute critters and funny heartwarming bits, but that's about what was good in the film. Beautifull rendering though, and incredible water simulation. Otherwise meh.