Originally Posted by
TRAVELSIG
I think the voucher is actually only 30 minutes.
I think they had both vouchers during some time in the past, i.e. for a while it was the 30min and now it's the 1 hour voucher. Last time I definitely got a 1 hour voucher. I actually prefered the 30 minutes, as they easily gave you 2 of them when you had like 40 minutes to spend in the lounge (so I could use the other one when not having lounge access, as it's valid on the whole airports wifi.)
So if you've a longer time in the lounge, it's no problem to ask for several vouchers. If you're using them at this very day or not, it's up to you, they're valid for couple months.