Articles like this would perhaps be more informative if they did mention the quality of things such as restrictive views, toilet facilities, legroom, lack of a roof etc.
For 400 quid you will get to see 3/4 of the pitch (less if yer short), have access to about 4 snack bars serving up to 6000 people, a wall to piss against (hate to think what women get), and "theoretical' cover from the rain