This is a spoiler free review.
You go into this movie and get what you expect. An epic experience. This isn't really a movie. It's the culmination of 11 years of movies and it's a collective end to the first three phases of the MCU.
The acting is great, this score really nicely complements what's going on on-screen, the visual effects are stunning and there is a lot of fan service which isn't a bad thing. I felt it did drag a bit towards the middle but the big fight scene at the end is bananas. It's honestly a spectacle and it has probably the best ending of any superhero film to date.