I'm rather new to reviewing comics, but this site includes them in the books I've read, and so shall I. I do not know enough about the practice of reviewing comics to properly address the art, so instead I will focus on the story.
And what a story! This is the kind of thing that Marvel does well, I think. It is a decidedly personal story of inner conflict as Peter struggles between two political factions, both of which have good points (how rare that is in real life!). The importance, though, is not in the political conflict, but in Peter's life as Spider-Man. He is forced to a point where he knows there will be repurcussions, both for himself and for those he loves, regardless of what he chooses. This is further complicated by the fact that those loved ones have opinions of their own.
I think the relationship between Peter Parker and Tony Stark was one of the strongest parts of Civil War, and this book tells us Peter's side of the story well, with the characteristic Spider-Man humour, but a thoughtfulness that you don't always see in superhero comics. Fundamentally, I think, Peter finds himself in a position many people do: trapped between two sides, not based on an abstract ideology, but on the actual realities of his life. It is the clash of idealism with pragmatism, of selflessness on a societal scale with selflessness on a familial scale, and of ties of friendship with political disagreement. This is what I enjoyed about Civil War.