We go in every year, buy the tickets from the ACO office next to the entrance on the day :
For the cash you get :
waiter service for drinks at the side of the track, you get a table and umbrella as well
restaurant - you need to book I think
clean bogs
good view of the track , not too cramped
short walk to champagne bar
well worth the cash, you only buy one ticket for the whole weekend
Jem