Essentially, Fee Simple is just another way of saying that a timeshare property is "deeded." A deed is a legal document which provides the title to a timeshare property and grants official ownership rights. Fee Simple is generally regarded as the preferred type of vacation ownership.
Fee Simple is essentially the opposite of right-to-use ownership, wherein owners are granted rights to a piece of property for a certain number of years, but the property is actually owned by a set of trustees. Rather, with Fee Simple or Deeded property, ownership continues forever and the ownership of the property can even be willed or passed along to heirs. Owners of Fee Simple timeshares can sell, rent or gift their property or usage rights at any time.