Vouchers question

[sussex]

Just about to buy tickets from one of the outlets suggested here - 7 day premium tickets.

Apparently they are vouchers that are exchanged for tickets at the first park you visit.

Is this exchange thing a quick process as we want to get to the park early to beat the queues etc - where is it done etc. - could it be done the night before (if not zonked from the flight)

Thanks

 

[UKDEB]

Vouchers can be exchanged at any ticket booth and all guest relations locations. Ticket booths are located outside the park entrances, except for Magic Kingdom where they're at the Transportation and Ticket Center. There are Guest Services both inside and outside all the parks, as well as at Downtown Disney West Side and Marketplace.