Saw it yesterday & loved it!! It needs to simmer down a bit before I know where it stands with me in regards to other movies, but I feel it's going to end up in the upper tier for me. So far, Captain America: The Winter Soldier is my all-time fave superhero movie and I don't think this one is going to change that. But, yeah, I thought A:AoU was really great, especially how in-between the many spectacular action scenes and with the enormous cast there are always plenty of character moments, both personal and team interaction bits.
Awesome!