I saw Civil War at the cinema yesterday evening (it came out a few days ago in my country). Here's my opinion about it. Of course, I won't spoil anything.
My favourite MCU and Marvel movie used to be The Avengers. Now, it's at second place. Civil War is absolutely my favourite. Not just my Marvel favourite, but also my favourite superhero movie, and one of my favourite movies overall. It is absolutely amazing. Black Panther and Spider-Man are fantastic. Probably my favourite portrayel of Spider-Man yet. A brilliant start to phase 3!