I was at the Patriots-Bills game in October. A friend from Boston warned me about the traffic, but I got to the game early enough that it wasn't an issue. I did, though, end up deep in a parking lot that I thought would take forever to escape....
I walked to the stadium, and took note of a nice service at the gate: there were separate security lines for folks carrying nothing (like me) and those with small backpacks and handbags. I'd like to see other stadiums adopt this policy.
Once inside the stadium, well, there is not much bad to say at all. The corridors are wide, there are plenty of places to buy food, and the views from the seats are fine (even from my corner of the endzone seat). I was in the front row of the middle level. One thing that puzzled me was how folks around me who were standing were asked to sit down by their fellow fans. As someone who sits in his seat, it didn't bother me, but, with the Pats D trying to stop the Ravens on 3rd down, if there is ever a time for the crowd to make a lot of noise this is it. The stadium crowd was loud enough--but just barely. I had similar seats at a Titans game this past week, and the crowd was much louder but not at all rude or overly rowdy. Similarly, the announcer/crowd play of "That's good for another Patriot's"/"First down" was soft. And, there was no booing when the out-of-town scores in the Dolphins or Jets game were announced! All in all, it seemed an energy that is present at Red Sox games is missing here. But, it seems like a great place to bring the family.
After the game, I got to my car easily, got out of the lot, and was on my way in no time--the police do a nice job of clearing the area.