If you use the same credentials and want to review your account / ticket receipts, etc. how will it know which venue/account you actually want? I understand if you go to a particular venue's show listings and purchase from there, but if you log on to review your shows, or re-print a receipt, etc. it won't know which venue account you want if you use the same credentials. Will it? (Even banks now let you view different accounts in the same window.)
My only complaint as of late is when I didn't receive a receipt in email, I logged on, it wasn't in my account, I called the TF number (hard to find by the way), it rang and rang and rang (not so good if you're wanting to buy tickets) then finally disconnected. I called back twice, and selected customer service and it rang and rang, same deal. So I called back, spoke to an agent after waiting five min., (again not so good if you use the phone to buy tickets) and they said "oh that dept. just got into the office, they are available to talk now." (the agent couldn't look anything up based upon my name, show, venue, etc.) So, I asked to be transferred to cust. service & they said there were unable to transfer, I'd have to call back. Not impressed.
Recently, I found Ticket Alternative to be all right w/ prices and transaction.