Booked tickets for Leonard Cohen at O2 months ago. Did say would not be delivered until week before. Was a bit anxious that this didn't leave much time for sorting if any problem, as not used Double8 before and know of horror stories of rogue ticket sites. However reassured by reviews from other users and all went as planned. Got an email few days before from Double8 to say tickets had been delayed arriving in their office but would be sent out very shortly. Got tickets by start of week. Good seats as described and enjoyed experience of a lifetime. Realize tickets sell way above face value and if had been able to be more flexible, like lived in London, could have got cheaper tickets from other sites but not an option when you have to plan ahead to get cheap rail tickets etc as well. Ticket prices are as described and you have the choice to pay up for a good seat or not. Would definitely use again.