Jo - I'm there fairly regularly. GO CHEAP! The view is amazing, the sound is excellent, the experience will stay with you for a very long time. However, go the the grocery store at the other end of Piazza Bra and buy a good cushion. The ones they rent at the Arena are too thin (even 2 didn't make me more comfortable). Also, check the seating map - you want to be on the West side of the Arena, it gets the shade earlier and therefore you're out of some of the heat. Dress for the weather, not the opera. I like to sit with the walkway immediately to my back - no one uses it during the performance and nobody's knees will jab you. You are in for a great time!