I had seats for row 4, seats 7 and 8 for the Ravens - Cleveland Browns game on Christmas Eve last year. Great memories since we got to tailgate with a lot of family for that game. Lots B-C are where you want to tailgate in my opinion.

Our seats were simply amazing. It was very hard to judge the depth of the field. For example, Ray Rice would run for what looked like a 20 yard gain but it ends up being only 10 yards. If you sit in row 4, you will be constantly referring to the big screens to see where the ball is placed.
136 is more of an end zone section than anything. It wasn't behind the uprights which was nice, I hate when those posts are in my view.

I was impressed with how close our seats were to the field, I know some NFL stadiums put big spaces between the field and where the seats begin but not M&T Bank Stadium. The seats are only six feet above the playing field!