Last year we checked into some of these tickets. They seemed too good to be true. The ones that I looked at were promotional tickets that required you to stay at certain resorts. There were many resorts to choose from, again still seemed to good. Then I read an article that said these tickets were technically non-transferable and you could be denied boarding if the airline found out. I really don't know how they work, I just didn't want to take any chances. I also emailed the seller questioning if these tickets were valid and transferable. The seller never responded. I am sure there are many valid offers out there, these just didn't seem to be.