So far the best.

Rating: 10/10 (26 April 2018)

It is. The best MCU movie, and my #1 favorite. This is something that I've never seen before in the MCU.
It's well balanced between the humor and the seriousness. It made me tear up a lot, I'm pretty sure many others cried too. I got surprised so much that I was literally in shock, even after the credits start rolling. It's darker than any other ones.
I am definitely satisfied with Avengers: Infinity War. Though maybe it will be hard to take in, I recommend everyone to watch it. Every Marvel fans shouldn't miss it.