I've spent over an hour today trying to track down a copy of our room bill. This is a fitting end to what was an awful experience from booking, to check in, to the actual quality of the amenities, and checking out. Trying to get the staff of the Mandalay Bay to help with anything is a near impossible feat. Take adding a person's name to the room for example. That took three phone calls and nearly an hour of time. I'm sitting on hold (min 26:48) as I type this review, still unable to connect with anyone capable of sending me an invoice.  Go to the cosmopolitan, or literally anywhere else.