I saw the concert in Gelsenkirchen - had GA tickets. I actually felt a bit far away from the stage, even though we were 2/3 into the GA area. A few times I turned my head to check out the back row, and I must say, that was the most active part of the seated stadium. They were much more into it than the people with the best tickets on the sides. So I guess it's all about attitude: If you want to have a blast, you'll have a blast.