We were there during the same time period. The person checking us in was really by the book - we had an agreement with the hotel that the reservation is made under Mr's name and then use my LTP benefits. That front desk refused it even after having seen the email. We insisted and he eventually went to see his manager and then said it was ok...

The next day we met a better front desk and we moved to the North Tower because the siren. So we didn't see the crash. We got 2pm late check-out though.