I have sat in section 135 a number of times, my dad and I used to go to Bills games quiet often. This is a huge section, there are 52 rows, rows are numbered 1-52. Section sits on the 30 yard line behind the Bills Bench. The only thing I don't like about this stadium is that it is plain and the seats are benches.
You will end up standing most of the game. If you have seat covers, take those.
This is an expensive section to sit in but Bills tickets overall are very affordable.