Just got done seeing this, and I agree with everyone else that it was awesome. And even though I despise 3D, the only showings that weren't 3D were really inconvenient, so I went ahead and did it anyway. 3D on this was WAY easier to follow than Age of Ultron. Not once did I feel like anything was blurry or too fast, even though shit was flying all over the screen. How can it be that different? Ultron 3D was ass for most of the fight scenes, and this was spectacular. This is the way 3D should be.
On top of that, since I had already decided on 3D, I threw out the extra cash and tried out those D-Box seats for the first time, which if you aren't familiar rumble and move around in time with the movie. Holy shit that was incredible. Several times I thought I was going to get flung out of my chair. I doubt I'd spend the extra for it again unless it was a guaranteed great movie like this one, but it was pretty cool I have to admit.
I am thinking that action movies this year rank thus:
Mad Max
Kingsman
Age of Ultron
I still loved Ultron, and would easily rank it an 8 or 8.5, but that just means the other two are even higher.