Civil War...As a standalone 7 issue event, you're really missing out on the whole story. It's by no means unreadable, but it's missing much of the fallout, or "effects" of the Super Hero Registration Act. The event only gives you the Major turning points, whereas the tie-in issues are where the real juice of the the story is located: How this law is changing public perception of the "Super-hero" and the heroes who are affected by that, the villains who capitalize on the ensuing chaos, the "human" perspective of the whole thing. So, the event issues themselves feels like, I don't know, the middle of this bigger story, the two towers of the LOTR trilogy, if you will.
On the good side, I find it's rather well written, no characters come off as appallingly mischaracterized. Steve McNiven's art is unreal; this team with Dexter Vines and Morry Hollowell I think create the best completed McNiven art. So every page is just a wonder, and there's some amazing group/action shots in this one.
So yes, it was good, but in order to experience Civil War correctly one should also read Civil War: Frontline by Paul Jenkins, the Wolverine Civil War tie-ins by Marc Guggenheim; and of course its almost paramount to have read all of Brubaker's Captain America run at this point because, in all honesty, some of the biggest fallout and the true "ending" of Civil War happens in the pages of that run.
All in all, good stuff. I appreciate this event for the hotbed of creativity it brought forth in the marvel universe, from Dan Slott's Avengers: The Initiative, to Warren Ellis' Thunderbolts, things are about to get epic.