I am 100% biased, but I enjoyed watching two great defenses go at it. I havn't seen a great Green Bay defense since 1996. I was at the edge of my seat the whole night. But like I said, I am biased and a Green Bay fan.
Besides, I still think since a lot of Starting QB's don't really play in the preseason the beginning of the season is a poor indicator on how good an offense is going to be. Some do come out hot, but I always believed Defense has the leg up at the beginning of the season.