I won a certificate for the Sheraton Charlotte at a charity silent auction. I called the 800 number and was told they had plenty of rooms available. I was then directed to use my certificate by calling the Charlotte location. The Charlotte front desk refused to take my certificate even though my day is not on the black out list. I was told the hotel was totally booked! I called the 800 number again and was told there were plenty of rooms available. I asked to speak to a supervisor. She back tracked and told me since the room rate had gone up to $409 they would not honor their gift certificate until the rates were lower!!! I was also told the hotel is undergoing construction at this time even with the high rates! I would give zero stars if allowed. Doesn't seem like such a great certificate to win now.