I booked a neighborhood balcony for the Oasis this month. The cabin was assigned two weeks before the sailing. It is too late to change the cabin, since the cabins are sold out in the category. I would not choose guarantee again since I am not happy with my assignment ( deck 14, Boardwalk). In years past, it seemed they assigned cabins much earlier, so it was relatively easy to switch if you were not happy. I will do my best to have a great time regardless. Happy Sailing!