So, a few of us saw it opening night and absolutely loved it. I loved it for so many reasons, but if I had to point out two flaws it would be these:
1. The first 20 minutes were jarring. For the first 20 minutes of the movie I was really concerned if this was going to be good - it felt uneven and SO much was introduced. It didn't feel cohesive or have a great flow.
2. Characters. By the end of the movie I loved the cast and the merry band of rebels, BUT if there is one thing that The Force Awakens did better, it was craft some really great characters that you cared about. But, and I LOVED The Force Awakens, Rogue One did just about everything else better.
Here are some fun links to sites that point out how it affected A New Hope (and, in my opinion, strengthen's the story of A New Hope by making it better) along with easter eggs and character cameos - I had actually missed just how much Star Wars Rebels is nodded to which was kind of cool.