On the whole, I'd place Civil War on-par with Batman V. Superman.
Now, I see you Marvel Zombies are readying your pitchforks and torches, so let me explain why.
Basically, Civil War has the exact same over-riding problems Batman V. Superman did.
It's primarily concerned with offering fan-service and making references to the comics at the expense of a cohesive story. It requires some characters to act in a blatantly illogical fashion in order for the plot to work. The villain's evil plan is entirely dependent upon coincidences that should be entirely beyond their control that are never adequately explained. And - much like Age of Ultron before it - Civil War seemed like it was more concerned with setting up upcoming movies than it was in telling its own stories. As Batman V. Superman left us more excited about Wonder Woman, so too does Civil War leave us more excited about Black Panther and Spider-Man: Homecoming.
Now with that being said, did I like the movie?
Technically, the film is far from perfect.. The first hour drags a bit. There's some incredibly cheap CGI. And a lot of the fight scenes are filmed WAY too close and the jump-cuts went by so fast I thought for a moment the projector was running at a too-fast frame-rate.
But THE fight scene - you know the one I mean - THAT fight scene is perfect.
The acting is great across the board. Tom Holland in particular is impressive and not just because he is easily the most comics-accurate Spider-Man we've ever seen in a live-action work.
Overall, I'd give it a 6 out of 10. Good. Not great. Better than Age of Ultron. Not as good as Winter Soldier.
Oh, and one more thing - stick around through ALL the credits. There's two sequences to look out for.