For anyone who's been to the opera at the Arena, I just got my tickets in the mail yesterday, and they are row 4, seats 9-11 on the numbered seats on the step. They cost about 96euros each. It's hard to tell from a picture the actual seating arrangement. We decided not to book on the floor, since it's flat and heads could get in the way- and we are a family of munchkins. Should we still bring binoculars? Thank you!