I recently received an invitation from the Vistana Resort for a 5 day/4 night stay for only $149.00 AND they give you $100 back in resort amenities. It is supposed to be for a one bedroom, but when I called they said if I came in April they would upgrade me to a 2 bedroom with NO CHARGE. I asked if a time share presentation was necessary and they said none was required. There is nothing on the letter that says one is required either. I booked it becasue I couldn't pass it by, but after reading some of the reviews on the older sections I am a bit nervous. Has anyone else received anything like this? Should I reconsider? Any advise would be much appreciated.