This definitely isn't easy to watch. You will get thrown into multiple completely different story arcs, and it might take some time to get used to the structure of the movie and all the stories, which are told parallel.
This is also the point where you either hate this film and wish it would end soon (which is problematic looking at the runtime), or get soaked into the plots, which are all genuine in their own kind - ranging from…
I left the cinema with mixed feelings regarding this one.
First of all: I totally loved the new story setting and the way it unfolds but keeps it's mysteries. This film is furthermore visually and acustically breathtaking.
BUT: It contains too much scenes that are cheap, unlogical or even dumb. This just is not enough for a film directed by Ridley Scott.
I don't know how he did it, but Joss Whedon managed to make a great superhero movie with enough focus on every character, lots of charming sequences for fanboys and visuals that make their stand beside those of the Transformers series.
As a bonus, the introduction of the Hulk character is the best ever made for cinema, ultimately wiping out all unnecessary memories of the two previous movie attempts.