Do NOT buy from these guys. They sold me a ticket to a seat that doesn't exist. When I asked for a refund they seemed confused and asked me to provide proof from the vendor that the seat didn't exist. After giving me the run around for an hour, they basically said, "Well technically we didn't give you those tickets, we are just a third party... we just broker a deal from someone else".
They are useless. If you are going to buy tickets, buy them elsewhere. Somewhere that takes care of their customers.