I loved this movie. It was non stop thriller from start to end. It was like dream film. All favourite stars in one movie. And technology used in the movie was unbelievable. I also liked how they utilised massive cast and gave all major stars worthy screentime. And they took a risk of tragic ending and it definitely made film a better one. Also guardians of galaxy cast made film more goofy and enjoyable.
On negatives I would say that it had terrible pacing. It was at highest level all the time. No time for breather. It made even climax look even the same as other phases of film. Also scarlett witch was one of the most powerful character ability wise in whole series. It's shame we never saw her to her full potential.
But I definitely loved the movie. Specially interactions between thor and rocket. Also between doctor strange and iron man. This movie will definitely be my favourite for quite some time