Oftentimes I book for same day arrival and sometimes late into the evening. Again last night hyatt.dumb showed all room categories available for sale for same day arrival. When I arrived to the hotel they were almost sold out and they couldn't i.e. provide me the bed type that I had booked. BTW the bed type guarantee doesn't apply for same day arrivals. Only to bookings made at least 24 hours in advance. Of my 120+ paid Hyatt stays last year this same problem occurred maybe four/five times. The properties did take care of the issue but it is somewhat surprising that at this day and age the inventory that is sold online doesn't even remotely reflect what is actually available at the hotel level.