I've always preferred TickPick to other vendors because of the "no hidden fees" thing. You know what you're paying up front. But I had the unfortunate opportunity of putting their customer service to the test when a seller failed to send me my tickets.
The TickPick reps were thorough and understanding. After a ton of back and forth in an attempt to get my original tickets, TickPick eventually agreed to replace my tickets the day of the event. Thank God. The event was a charity fundraiser benefiting cancer research, and it meant a lot for me to be able to attend. I am really thankful that TickPick came through for me.