Yes. In my case the concert is tomorrow and I still had not received anything from this company. When I called, the guy finally sent me the link to the tickets. Very shady.

I received the link and the tickets were transferred successfully however I have known of others who experienced difficulty. The only advice is to pay attention to the due date established for you to receive your tickets and if you do not receive them by the date guaranteed then call the vendor. Don't let extra time go by or wait until the day of the event. They are supposed to provide support if you experience difficulty with the transaction.