When you print your ticket, the piece of paper on which you print it has a bar code. Stubhub is very reputable -- you can be sure it will work.

I have stayed at Marriott Magnificent Mile. It's a big downtown Marriott like any other. Some people complain about slow elevators but we didn't have any problem. The rooms are slightly out of date, but it was still very comfortable (great Marriott beds and bedding) and in a great location. If it's a good price, I would definitely stay there.

Thanks sf7307! I needed to hear this. i am going crossed eyed looking at all the choices.

Do you or anyone have an opinion of Hyatt Regency Downtown? These are the 2 I have narrowed it down to and the difference is about $200. That's a few tickets!

And speaking of tickets, the barcode is scanned when we present it? Is this correct?
Thanks for your help

Yes the barcode is scanned when you present, just like a "hard" ticket.